To provide a centrifugal clutch device using a clutch boss having shoe side face supporting parts radially formed in combination with two clutch shoes for establishing a stable operation clutching condition.

The clutch shoes 4a, 4b include a sector weight body 6, hook parts 8a, 8b protruded from the side face of the weight body 6, and a sector rubber cover part 10 covering the whole surface of the weight body 6. The clutch boss 3 includes a clutch boss body 16, the shoe side face supporting parts 17a-17d radially formed on the outer periphery of the clutch boss body, a first shoe storage part 18a formed between the first shoe side face supporting part 17a and the second shoe side face supporting part 17b to store the clutch shoe 4a, a second shoe storage part 18b formed between the third shoe side face supporting part 17c and the fourth shoe side face supporting part 17d to store the clutch shoe 4b, and contraction energizing means 5a, 5b applied onto the hook parts 8a, 8b for energizing the contraction of the clutch shoes 4a, 4b.