When a vacuum-suction tool stand (1) is to be stuck to a table (2), a valve (16) is rotated to a position so that a knob (163) comes to the right side thereof viewed from the front to establish communication between an air suction hole (132) and a cavity (131). Then, by sucking the air within the cavity (131) through the air suction hole (132) using a suction pump (not shown) to make the inside of the cavity (131) close to a vacuum state, thereby the vacuum-suction tool stand (1) is stuck to the table (2). To release suction, the knob (163) of the valve (16) is rotated clockwise by 90 degrees. Then, the communication between an air release hole (15) and the cavity (131) is established and the air is supplied to the cavity (131) in a substantially vacuum state, and thus the vacuum-suction state is released.