We realize a wide spaced frequency comb by using an exteal low-fineness Fabry-Pérot (F-P) cavity to filter fewcycle laser pulses from a Kerr-lens mode-locked Ti:sapphire laser at the fundamental repetition rate of 350 MHz.Mode spacing as wide as 15 GHz with spectrum covered from 690hm to 710nm is demonstrated,corresponding to a filter multiple of about 43.The scanning transmission peaks after the F-P cavity with cavity lengths are also simulated numerically,and the results are in agreement with the experiment.