To adjust the length of an operating lever of a mixing valve for water combination faucet according to a user by connecting the base of an operating lever and an operating part in such a manner as to slide the operating part to the base to obtain an arbitrary length of the operating lever.

An operating lever 1 is so constructed that the base 2 on the main body side of a mixing valve for water combination faucet 10 and an operating part 3 held by hand at the time of operating the lever by hand are connected to each other by a slide mechanism 4. The slide mechanism 4 puts in and out the operating part 3 to the base 2 to vary the full length of the operating lever 1, whereby the length is adjusted to be convenient to a user. Then, the outer peripheries of the respective tips of a pair of right and left arms of the base are slidably inserted and fitted to the pipe parts of both end parts of the operating part 3, and fixing means are provided on both fitting parts. Thus, the length of the lever can be adjusted according to the convenience of a healthy person and a wheelchaired user to use the mixing valves for water combination faucet.