Microstructure and mechanical properties of WC-3 wt% Co cemented carbides, fabricated by a spark plasma sintering (SPS) process, were investigated in this study. The WC-3 wt%Co powders were sintered at $900{sim}1100^{circ}C$ for 5min under 40MPa in high vacuum. The density and hardness were increased as the sintering temperature increased. WC-3 wt%Co compacts with a relative density of 97.1% were successfully fabricated at $1100^{circ}C$. The fracture toughness and hardness of a compact sintered at $1100^{circ}C$ were $21.6 MPa{cdot}m^{1/2}$ and 4279 Hv, respectively.