To carry easily by reducing size and weight by equipping a brake having a speed control lever and an emergency stop device furnished with a locking mechanism that stops the rotation of a drum and a resetting mechanism that releases the locking mechanism in the interior of a box.

When a fire occurs, an evacuee M wraps the belt of a descending device around his chest and hooks, at by hook 8 at the tip of the belt 7, and then draws to a stranded wire 2 from a box 1, pulling a brake releasing lever and wraps the wire 2 around strong furniture, or the like, in a building and engaged the hook 8 at the end of the stranded wire 2 with the stranded wire 2. Subsequently, he/she moves to a window, or the like, facing the outside, holding the box 1, releases the brake releasing lever and then projects his body out from the building and is hung from there. Subsequently, by pulling down the speed control lever, the stranded wire 2 is reeled out from the box 1. At this time, if the reeling out of the stranded wire 2 is accelerated due to malfunction, or the like, the emergency stop device operates and stops descent.