The pulse compression for the femtosecond photonic crystal fiber laser is obtained by hollow core photonic bandgap fibers (HC-PBGF). The fiber laser directly outputs 475 fs pulses at a central wavelength of 1040 nm with an average power of 400 mW, corresponding to a pulse energy of 8 nJ. The dispersion of the HC-PBGF is measured with a white light interferometry method, which shows that the fiber has an abnormal dispersion of about -48 ps2/km and can be applied to compensate the positive chirp of femtosecond pulses from the fiber laser. After compression from the fiber with an optimized length, the pulses are compressed to 108 fs, which is close to Fourier transmission limitation. The transmission efficiency is about 89%, which is much better than a grating pair. The spectrum keeps the same as that of the input pulse after passing through the fiber, due to the low nonlinearity and bandgap properties of the HC-PBGF.