The study aims to analyze the effect of Struktur Modal,Profitabilitiy , and Size on Firm Value. The object is manufacturing companies. The sample collection technique has been done by using purposive sampling. This research using purposive sampling method as technique sampling with the number of samples acquired is 26 companies and in total 130samples. which are listed in Indonesia Stock Exchange (BEI) and the research periods are five years which is started from 2012 to 2016. The analysis method has been done by using the multiple liniear regressions with Eviews Aplication. The result of this research shows that (1) Struktur modal does not have any influence to the firm value; (2) profitabilitas has positive influence to the firm value ; (3) firm size has positive influence to the firm value.