To provide a tuning fork type quartz resonator having a low CI value and a quartz resonator package provided with the quartz resonator. A silicon material lower in specific gravity and stiffness than those of conventionally used gold (Au) is used as an electrode material for an electrode pattern such as excitation electrodes for making the tuning fork type quartz resonator generate tuning fork oscillation. By this structure, the quartz resonator is made easier to oscillate so that the oscillation loss (CI value) can be lowered during conversion of electric energy into tuning fork oscillation.