This study discusses about the factors that affect shopping online at Kaskus forum. This study uses the variables to be tested include consumer trust, ease of use, and price will affect the decision to shop online trading forum Kaskus.The objective of this research is to explain the effect of trust, Ease of use, and price on consumer purchase decision in the context of online shopping in Indonesia.
This research was conducted with descriptive research design. This research will explain the relevance of the construct of the research model. The research subjects are people in Jakarta who has buying online 3 times in Online Trading Forum Kaskus . Data were collected through a survey on the number of respondents who selected through purposive sampling technique, which has some screening questions to get the qualified results. This study used Spss 21 software. Validity and reliability of measurement used to measure the indicators proposed in this study.
This research proves that the trust, ease of use and Price has positive effect on purchase decision online.

Keywords: internet, online shopping, trust, ease of use, price, purchase decision