The P-receiver function technique was applied to one year data of 55 seismic stations in the Central zone of Kamchatka. Crustal thickness and the average crustal Vp/Vs ratio under each station are determined using grid search technique H-k stacking. The crustal thickness varies from 25 to 40 km. The average crustal Vp/Vs ratio in the upper crust ranges from 1.6 to 1.9. The obtained results consist with the other researcher's studies