The purpose of this reserach was to analyzed the effect of security, easy, trust and
information quality on online purchasing decisions among Facebook users in the
city of Cilacap. This reserach uses quantitative research methods, the sampling
technique was non-probability Sampling, obtained through purposive sampling is
a sampling technique with certain considerations. The sample in this research was
105 respondenfs. The research mel hod used in Jhis research was mulliple
regression analysis. The results of the analysis showed that partially, security,
easy, trust and information quality have a positive and significant effect on online
purchasing decisions. Furthermore, the results of the simultaneous analysis show
that security, easy, trust and iriformation quality simultaneously influence online
purchasing decisions. Then the variability of all variables has an influence on
online purchasing decisions by 28. 7%