To provide a gate of a non-lane type, which is increased in degree of freedom of design in a height direction, such as arrangement of a spike on a gate door portion, has a downsized guide box, and facilitates automation thereof.

The gate 1a is formed of the guide box 5 and the gate door portion 7, and allows open end faces 9, 11 of the guide box 5 to serve as entrances of the gate door portion 7. The guide box 5 has a plurality of bearing rollers 13 arranged therein on front and rear sides of the gate door portion 7, and by bringing the bearing rollers 13 into rolling contact with guide crossbars 15 horizontally arranged on a front surface 17 and a rear surface 19 of the gate door portion 7, the gate door portion 7 is supported slidably with respect to the guide box 5.