PURPOSE: To enable traveling with a limit speed corresponding to the traveling environment and to realize a safe unmanned carrier by storing the limit speed at random points on a travel path into a controller.

CONSTITUTION: Upon provision of a current position and a target position, a travel control section 3 determines a determines a travel path based on a route data fed from a route data memory section 2 and provides a travel map, whereafter the travel control section 3 receive signals from a point detecting section 6 and a rotary pulse input section 5 and controls traveling of travel motor 4. The route data memory section 2 is provided with limit speeds at random points on a travel path from a route data input section 1. The travel control section 3 controls the travel motor 4 such that the traveling sped does not exceed the limit speed at each point on the travel path.