PURPOSE: To provide objective descending speed easily and also flexibly response to various required specifications by adjusting a centrifugal brake at an installing field.

CONSTITUTION: A plurality of oscillation links 7... taking central part as supporting point are pivotally supported on a periphery part of a rotator 4 mounted on a fixed cylindrical member 1. A brake shoe 8 is mounted on one end part of the oscillation link 7. A balance weight 11 is mounted on the other end part of the oscillation link 7. The balance weight 11 is formed out of a plurality of weights 20... mounted for exchanging in the other end part of the oscillation link 7. The weight 20... comprise a large diameter ring member and a small diameter ring member having smaller weight than the large diameter ring member.