Stock investment is one of the interesting investment but with high risk. Stock of go public companies as an investment comodity is considered risky because of its sensitivity toward the changes of politic, economy, monetary and also that happens in the company itself. These changes can cause the stock price to change in the stock market that will later give impact to the return for investors. If the result is less than expected because of the stock price fluctuation, then it what is called stock risk. The data used in this study is secondary data included daily stock price, daily IHSG, and monthly inflation level for the period of 2001-2002. Emiten choosen are 22 companies categorized as LQ 45 constantly during the period of study. The result shows that inflation does impact the stock risk level.