This research aimed at (1) finding out the story of “Anak Jalanan” soap opera aired on TV during the prime time; (2) identifying the behavior of Magrib prayer congregaction among the students before watching “Anak Jalanan” soap opera; (3) analyzing the behavior of Magrib prayer congregation among the students who watch “Anak Jalanan” soap opera ; (4) finding out the effects of “Anak Jalanan” soap opera towards the behavior to participate in maghrib prayer congregration among the students of MTs Ummul Quro Sleman Yogyakarta. This research employed phenomenological approach. The research subjects consisted of students whose characteristics are watching and are familiar with “Anak Jalanan” soap opera and participate in Magrib prayer congregration. The data collection was done through interviews, observation, and documentation. The data were analyzed based on Miles and Huberman’s theories of (1) data reduction; (2) data presentation; (3) data verification using triangulation. The research result shows that (1) the story in “Anak Jalanan” is about a gang of sport motorbikers who are involved in fights and brawls with other similar gangs and the conflicts between Boy and Reva with Adriana; (2) the behavior to participate in Magrib prayer congregration before watching “Anak Jalanan” soap opera because they still participate in Magrib prayer congregration; (3) the behavior to participate in Magrib prayer congregration after watching “Anak Jalanan” soap opera becomes worse; (4) “Anak Jalanan” soap opera has affects on the behavior to participate in Magrib prayer congregration among the students of MTs Ummul Quro, makes students come late, lazy and difficult to rule, to be less routine until leave Magrib prayer congregration.