Guide tracks 56, 56 projecting in a vertical direction are provided in a right and left of a running track 50 and left and right guide rollers 20, 21 are provided on a track guided vehicle and guided using inner surfaces of the left and right guide tracks. Branching rollers 22, 23 each comprising elevating and lowering means are provided in the right and left of the track guided vehicle and outside the right and left guide tracks. Thus, branching and rectilinear progression of the track guided vehicle is controlled by switching between a state where the branching rollers 22, 23 are elevated or lowered to guide the track guided vehicle using outer surfaces of the guide tracks 56, 56 and a state where the branching rollers 22, 23 do not contact with the outer surfaces. Whether the track guided vehicle runs straight or shifts to a branch line can be controlled by contacting one of the branching rollers 22, 23 with the outer surface of the corresponding guide tracks 56, 56, which guide the guide rollers 20, 21 in the section (rectilinear progression section 52) different from the branching portion 51.