[ABSTRAKbrPenelitian ini bertujuan untuk menganalisis pengaruh dari struktur pasarperbankan terhadap profitabilitas dan stabilitas bank terkait rencana integrasisektor perbankan ASEAN yang merupakan salah satu cetak biru dari MasyarakatEkonomi ASEAN (MEA). Dalam mengukur struktur pasar perbankan digunakanpangsa pasar bank {Relative Market Power (RMP) Hypotesis} dan konsentrasipasar perbankan {Structure Conduct Performance (SCP) Hypothesis}. Penelitianini menggunakan data bank komersial yang terdaftar di pasar bursa saham negaraASEAN 4, yaitu Indonesia, Malaysia, Thailand, dan Filipina pada periode 2009-2014. Hasil penelitian ini menunjukan RMP Hypothesis berlaku di perbankanASEAN dalam mempengaruhi profitabilitas bank, namun tidak berlaku diThailand dan Filipina. Di Indonesia SCP Hypothesis berlaku dominan dalammenentukan profitabilitas bank. Lain halnya dengan Malaysia, EfficiencyHypothesis mengonfirmasi hubungan pangsa pasar, konsentrasi pasar, danprofitabilitas bank. Penelitian ini juga menemukan bahwa konsentrasi pasarperbankan berpengaruh negatif terhadap stabilitas bank pada perbankan ASEAN,Thailand dan Filipina. Hal tersebut mendukung konsep Concentration Fragility.Lain halnya dengan Indonesia dan Malaysia, konsetrasi pasar perbankan membuatbank lebih tidak stabil. Sehingga hal tersebut mendukung Concentration Stability.Penemuan penting dalam penelitian ini adalah bank dengan pangsa pasarbesar/ukuran besar dan permodalan kuat membuat bank dapat bersaing terkaitrencana integrasi sektor perbankan ASEAN. Hal tersebut dapat dilakukan denganmarger dan akuisisi, khususnya untuk Indonesia.;This study is aimed for analyzing the influence of banking market structure onbank profitability and stability related to ASEAN banking sector integrationplan which is in line with blue print of ASEAN Economic Community (AEC).In measuring banking market structure, the research utilized reference of bankmarket share {Relative Market Power (RMP) Hypotesis}and banking marketconcentration {Structure Conduct Performance (SCP) Hypotesis}. This researchalso utilized other references of commercial banks in which listed in stockexchange of ASEAN 4 countries: Indonesia, Malaysia, Thailand, and Filiphinefor 2009 ? 2014 period. One of the research findings has shown that RMPHypotesis takes part in influencing bank profitability in ASEAN banks, but itdoes not work in Thailand and Filiphine. In case of Indonesia, SCP Hypothesisdominantly takes part in creating bank profitability. In case of Malaysia, on theother hand, Efficiency Hypothesis confirms market share, market concentration,and bank profitability. The research has also found out that banking marketconcentration contributes negative impact on bank stability in ASEAN banks,Thailand and Filiphine. This matter supports Concentration Fragility. On thecontrary, in case of Indonesia and Malaysia: banking market concentrationleads to more instability within the banks. The condition, therefore, supportsConcentration Stability. The important finding of this research is that highmarket share/bigger bank and strong capital leads to banks in order to win thecompetition in regard with ASEAN banking integration sector plan. Thisachievement can be reached by policy of merge and acquisition, especially forIndonesia banks.;This study is aimed for analyzing the influence of banking market structure onbank profitability and stability related to ASEAN banking sector integrationplan which is in line with blue print of ASEAN Economic Community (AEC).In measuring banking market structure, the research utilized reference of bankmarket share {Relative Market Power (RMP) Hypotesis}and banking marketconcentration {Structure Conduct Performance (SCP) Hypotesis}. This researchalso utilized other references of commercial banks in which listed in stockexchange of ASEAN 4 countries: Indonesia, Malaysia, Thailand, and Filiphinefor 2009 ? 2014 period. One of the research findings has shown that RMPHypotesis takes part in influencing bank profitability in ASEAN banks, but itdoes not work in Thailand and Filiphine. In case of Indonesia, SCP Hypothesisdominantly takes part in creating bank profitability. In case of Malaysia, on theother hand, Efficiency Hypothesis confirms market share, market concentration,and bank profitability. The research has also found out that banking marketconcentration contributes negative impact on bank stability in ASEAN banks,Thailand and Filiphine. This matter supports Concentration Fragility. On thecontrary, in case of Indonesia and Malaysia: banking market concentrationleads to more instability within the banks. The condition, therefore, supportsConcentration Stability. The important finding of this research is that highmarket share/bigger bank and strong capital leads to banks in order to win thecompetition in regard with ASEAN banking integration sector plan. Thisachievement can be reached by policy of merge and acquisition, especially forIndonesia banks., This study is aimed for analyzing the influence of banking market structure onbank profitability and stability related to ASEAN banking sector integrationplan which is in line with blue print of ASEAN Economic Community (AEC).In measuring banking market structure, the research utilized reference of bankmarket share {Relative Market Power (RMP) Hypotesis}and banking marketconcentration {Structure Conduct Performance (SCP) Hypotesis}. This researchalso utilized other references of commercial banks in which listed in stockexchange of ASEAN 4 countries: Indonesia, Malaysia, Thailand, and Filiphinefor 2009 – 2014 period. One of the research findings has shown that RMPHypotesis takes part in influencing bank profitability in ASEAN banks, but itdoes not work in Thailand and Filiphine. In case of Indonesia, SCP Hypothesisdominantly takes part in creating bank profitability. In case of Malaysia, on theother hand, Efficiency Hypothesis confirms market share, market concentration,and bank profitability. The research has also found out that banking marketconcentration contributes negative impact on bank stability in ASEAN banks,Thailand and Filiphine. This matter supports Concentration Fragility. On thecontrary, in case of Indonesia and Malaysia: banking market concentrationleads to more instability within the banks. The condition, therefore, supportsConcentration Stability. The important finding of this research is that highmarket share/bigger bank and strong capital leads to banks in order to win thecompetition in regard with ASEAN banking integration sector plan. Thisachievement can be reached by policy of merge and acquisition, especially forIndonesia banks.]