Abstract: The integrated resonator fiber optic gyroscope (RFOG) using a hollow core photonic bandgap fiber (HCPBF) is realized. The coupling structure of the resonator is designed and fabricated based on the micro-optical structure. The definition of the resonator is experimentally measured to be 3.7. The gyroscope system based on this kind of resonator is constructed and its responses corresponding to the stationary and rotational states are tested experimentally. The results show that the maximum observed peak to peak drift over a 60 s measurement and the long-term drift over 1 h measurement are 2.45 ()/s and 7.11 ()/s, respectively. In addition, the gyroscope outputs of 50 ()/s (integral time: 10 s) and 100 ()/s (integral time: 10 s) are obtained by using the proposed simulating turntable experiment and the Sagnac effect of our gyroscope system is demonstrated. The coupling loss is the main factor to influence the performance of the gyroscope by analysis. For the resonator structure we proposed, it is possible and feasible to apply in the gyroscope system.