Abstract: A control valve of a faucet includes a base, a lower ceramic block, an upper ceramic block, a coupling block, a bottom bushing, an inner barrel, a housing, and a control shaft. The control shaft has a lower end formed with a drive member rested on the inner wall of the inner barrel. The drive member of the control shaft has a peripheral wall formed with a plurality of flattened faces. Thus, the flattened faces of the drive member of the control shaft reduce the friction between the drive member of the control shaft and the inner wall of the inner barrel, so that the control shaft is operated easily and conveniently, thereby facilitating a user operating the faucet.

Abstract: A faucet includes a main body, a control valve, a drive shaft, and a handle. The drive member of the drive shaft has a peripheral wall contacting with the mounting recess of the control seat of the control valve and formed with a plurality of spacing portions to reduce a contacting area between the drive member and the mounting recess to prevent the drive member from being expanded excessively due to absorbing the water to jam the mounting recess, so that the drive shaft is operated easily and conveniently, thereby facilitating the user operating the faucet.