[ Penelitian ini didasari oleh fenomena penggunaan telepon genggam secaraberlebihan sehingga mengganggu kehidupan pribadi maupun profesionalpenggunanya.Penelitian ini bertujuan untuk menjelaskan apakah self-esteem danloneliness memiliki hubungan dengan mobile phone addiction. Pengukuran selfesteemmenggunakan Rosenberg?s Self-esteem Scale, pengukuran lonelinessmenggunakan UCLA Loneliness Scale sedangkan mobile phone addiction diukurmenggunakan Mobile Phone Addiction Index. Karakteristik responden dalampenelitian ini adalah dewasa muda dengan rentang usia 20-40 tahun yangmemiliki telepon genggam dengan akses internet. Jumlah responden yangdidapatkan sebanyak 296 orang dengan menggunakan teknik accidental sampling.Hasil penelitian menunjukkan bahwa hipotesis null ditolak (r = 0.157, p < 0.05)dan nilai determinasi sebesar 0.025 (r2 = 0.025), yang berarti terdapat hubunganyang signifikan antara self-esteem dan loneliness terhadap mobile phoneaddiction. Hal ini menunjukkan bahwa tingkat mobile phone addiction seseorangdapat diprediksi berdasarkan tingkat loneliness dan tingkat self-esteemnya sebesar2,5% dan sisanya dijelaskan oleh variabel lain. Implikasi dari penelitian ini adalahdiharapkan bahwa masyarakat dapat mengidentifikasi penyebab dari kecanduantelepon genggam dan segera melakukan intervensi.;This study is based on excessive use phenomenon of mobile phones that interferesone?s personal and professional life. This research aims to explain the relationshipbetween self-esteem and loneliness towards mobile phone addiction. Self-esteemis measured by using Rosenberg?s Self-esteem Scale while loneliness is measuredby using UCLA Loneliness Scale. Lastly, mobile phone addiction is measured byusing Mobile Phone Addiction Index. Respondent counts 296 young adultsbetween 20-40 who own a mobile phone with internet access. The results showthat the null hypothesis is rejected (r = 0.157, p < 0.05) and determination value0.021 (r2 = 0.025), which means there is a significant relationship between selfesteemand loneliness towards mobile phone addiction. The implications of thisresearch are expected to enable the society to identify causes of mobile phoneaddiction and immediately start an intervention.;This study is based on excessive use phenomenon of mobile phones that interferesone?s personal and professional life. This research aims to explain the relationshipbetween self-esteem and loneliness towards mobile phone addiction. Self-esteemis measured by using Rosenberg?s Self-esteem Scale while loneliness is measuredby using UCLA Loneliness Scale. Lastly, mobile phone addiction is measured byusing Mobile Phone Addiction Index. Respondent counts 296 young adultsbetween 20-40 who own a mobile phone with internet access. The results showthat the null hypothesis is rejected (r = 0.157, p < 0.05) and determination value0.021 (r2 = 0.025), which means there is a significant relationship between selfesteemand loneliness towards mobile phone addiction. The implications of thisresearch are expected to enable the society to identify causes of mobile phoneaddiction and immediately start an intervention., This study is based on excessive use phenomenon of mobile phones that interferesone’s personal and professional life. This research aims to explain the relationshipbetween self-esteem and loneliness towards mobile phone addiction. Self-esteemis measured by using Rosenberg’s Self-esteem Scale while loneliness is measuredby using UCLA Loneliness Scale. Lastly, mobile phone addiction is measured byusing Mobile Phone Addiction Index. Respondent counts 296 young adultsbetween 20-40 who own a mobile phone with internet access. The results showthat the null hypothesis is rejected (r = 0.157, p < 0.05) and determination value0.021 (r2 = 0.025), which means there is a significant relationship between selfesteemand loneliness towards mobile phone addiction. The implications of thisresearch are expected to enable the society to identify causes of mobile phoneaddiction and immediately start an intervention.]