A washbasin includes: a washbasin body having a water containing space and comprising an insertion hole formed in a front surface thereof in a downward inclined direction and a drain hole formed on the bottom surface thereof; a water supply nozzle projected toward the water containing space through the insertion hole from a rear end of the washbasin body, wherein the projected portion of the water supply nozzle is rotated in a direction desired by a user so as to control a water supply direction and a water supply amount; a cold/hot water supply valve buried in a one-side edge of the washbasin body and coupled to the water supply nozzle through a pipe; and a cold/hot selection level installed on the top surface of the cold/hot water supply valve and selectively supplying cold/hot water to the water supply nozzle.