To have a function to smoothly perform guide action of a guide pin against a sorting conveyor without causing complicated construction.

Sliding bodies 2 provided side by side are slidably supported on the outer cirumferential face of an endless conveyor 1, a pin gate 5 through which the guide pins of the sliding bodies 2 are passed, and guide rails 3 are provided inside the track of the endless conveyor 1, first and second guide bodies 6a, 6b guiding the guide pin passed through the pin gate 5 to either of right and left carrying guide rails are in order provided directly before the guide rails 3, and supported capably of being advanced or retreated against the center passing track (d) of the guide pin. The guide pin passed through the pin gate 5 is selectively guided to either of right and left guide rails 3a, 3b or the center passing track (d) by advancing/retreating movement of the first and the second guide bodies 6a, 6b.