Abstract: Based on the observation, the occupants of a housing are multicultural and rich with cultural diversity it was assumed to be different both in the way they communicate and interact with each ethnic group and it was certainly required adaptation of the respective ethnic groups. This study intends to determine"How intercultural adaptation of various ethnic groups living in the Gending mas housing Pasirjati Bandung?". To reveal this phenomenon the researchers used a qualitative research method by using symbolic interactionism model. The researchers used purpossive sampling and three data collection techniques: observation, interview and review of documentation. The research found that ethnic diversity in Gending mas housing came from Sunda, Java, Batak, Padang, Madura, Toraja and Malays ethnic. Mutual adaptation has occurred among the various ethnic groups as fellow immigrants who live in the housing. Mutual esteem and respect between ethnic groups allowed each ethnic group to run their own cultures. Sundanese as the largest part of housing residents, usually use Sundanese or Indonesian language when they were having dialogue. Javanese dialect and the use of native language among them was more prominent when compared with other ethnic groups while other ethnic groups more frequently using Indonesian when interacting internally (within the same ethnic group) as well as with other ethnic. Relations between ethnic groups has so far proceeded without a hitch which means each ethnicity has been mutually accepted other ethnic as it is. The conclusion of this study showed that adaptation was going well, although Sundanese were the most numerous ethnic but at the level of the cultural values projection they carried, it was more fluid and more flexible in the adaptation. The use of Sundanese languange, verbally and nonverbally was not a dominant factor in the interaction process with other ethnic groups.