A powder/granular material spreader that allows easy cleaning of a passage for powder/granular material includes a housing that houses motors, a passage that extends through the housing and provides a passage for the powder/granular material, a roller provided in the passage to feed the powder/granular material and that is driven by one of the motors, and a spinner driven by the motor to spread the powder/granular material. The passage includes an integral first wall that shields the motor from the passage, an integral second wall that shields the motor from the passage, and an opening located at an inlet of the passage. The opening is integral with the first wall and the second wall. The housing includes an integral cover that covers tops and sides of the motors, and fits over an outer surface of the opening. A seal is provided at a location where the opening and the cover are connected with each other.