PURPOSE: To provide rail arrangements capable of stopping a movable rail laid in one place at three or more plural positions, stopping at each position accurately and shocklessly, and simplifying the entire structure and controls.

CONSTITUTION: In order to branching a movable body of a fixed rail device 1 on one of the sides to fixed rail devices 4, 5, 6 on the other side, a movable rail device 8 is connected to the fixed rail device 1 and the movable body is moved to a movable rail device 8. After actuating a reciprocating device and moving the movable rail device 8 by the parallel direction H, the movable rail device 8 is stopped at three or more stopping positions A, B, C of fixed rail devices 4, 5, 6 and connected thereto and the movable body is moved to fixed rail devices 4, 5, 5 The movable body, which has moved the fixed rail device 4, 5, 6 group can join the fixed rail device 1 by reversed operation.