SUMMARY
The purpose of this study is to analyze the effect of related party transaction and the effectiveness of audit committee on audit fee. This research uses samples a manufacturing company in Indonesia Stock Exchange (IDX) in 2014-2018. The sampling technique used purposive sampling. The total number of companies used as research samples is 118 companies. Using tools SPSS 20 and testing hypothesis using linear regression. The F test indicates a stable and significant model. R square is 58,7 percent. The results show that related party transactions have a significant positive effect and the effectiveness of the audit committee has a significant negative effect on audit fees.Keywords: Related Party Transaction; Effectiveness Of Audit Committee; Audit Fee.