This study examines the issue realization greeting datu in expressive speech acts in Banjar language. Issues to be raised is how a form of greeting in the language Banjar datu and how the realization of politeness use datu greeting in expressive speech acts in Banjar people. The objective to be achieved is a form of greeting describe how datu in Banjar and the realization of politeness use datu greeting in expressive speech acts in public Banjar. Metode is descriptive qualitative research. engineering research record and record. Source data from public utterances sungai Nuts, Martapura. January data collection time 2015s / d in March 2015. The result of the discussion of datu greeting being unknown in Banjar language used in polite to call older people because of the kinship or blood, can also be due to the age factor alone, and therefore regarded as the "magical", meanwhile, the realization of politeness use datu greeting in expressive speech acts in Banjar community includes speech acts expressive praise, blame, grateful, and apologized