The present invention provides a mixing faucet that can use a low-cost temperature sensing spring. A mixing faucet (1) includes a casing (2) having a hot water inlet opening (24), a cold water inlet opening (23), and an outlet opening (28); a control valve element (3) slidably mounted in the casing (2) and capable of switching between any one of a cold water discharge state, a mixed water discharge state, and a hot water discharge state; a temperature adjusting screw (7) rotatably disposed at one end in the casing (2); a slider (6) sliding in the casing (2) through rotation of the temperature adjusting screw (7); a bias spring (5) disposed in the casing (2), between the control valve element (3) and the slider (6), and biasing the control valve element (3) toward the cold water inlet opening (23); a temperature sensing spring (4) which biases, in the casing (2), the control valve element (3) toward the hot water inlet opening (24), and the elastic force of which changes in accordance with changes in the temperature of hot water flowing in the casing (2); and a pull-up spring (10) for biasing the control valve element (3) toward the hot water inlet opening (24) in the cold water discharge state and in the mixed water discharge state.