PURPOSE: A liquid jet apparatus is provided to smoothly form a body of the liquid jet apparatus without a concavo-convex part by including a connection part on the rear of the apparatus and to enable a user to grip the liquid jet apparatus. CONSTITUTION: A liquid jet apparatus comprises: a body(10) which includes a liquid channel, an air channel, and a connection part and is longitudinally formed; a liquid containment tank(40) which is connected to the liquid channel and supplies a liquid for the spray; an opening/closing member which part is exposed to internal space of the liquid channel and selectively opens/closes a liquid spray hole; and a control lever which is connected to the opening/closing member and makes the opening/closing member move to the forward and backward.
