This study aims to analyze the influence of profitability, leverage, underwriter reputation, current ratio and firm size on underpricing. The object of research is go public companies listed on the Indonesia Stock Exchange (IDX) for the period 2012-2017. This study used a purposive sampling method as a sampling technique with a total sample of 99 samples. The analytical tool used in this study is multiple linear regresion with SPSS 23 program. The results of this study are that profitability has a significant negative effect on underpricing, leverage has a significant positive effect on underpricing, underwriter reputation has no effect on underpricing, current ratio has no effect on underpricing and firm size has significant negative on underpricing.