A washer arranging apparatus (10) includes a washer arranging portion (11) for positioning a plurality of washers (53) in predetermined arranging positions (α), and a washer supplying portion (12) for supplying the washers (53) to the washer arranging portion (11). The washer supplying portion (12) includes a holding portion (20) that has a horizontal floor portion (a bottom surface portion 21a of a base portion (21)) and is a portion for holding the washers (53) loaded into the washer supplying portion (12), and a vane member (23) that rotates above the bottom surface portion (21a) about an axis of the washer arranging portion (11) and pushes the washers (53) held in the holding portion (20) in a direction parallel to the bottom surface portion (21a). This washer arranging apparatus (10), a washer arranging system provided with this washer, arranging apparatus (10) and a washer setting tool (30) that is a tool for simultaneously setting a plurality of washers (53), and a washer arranging method using this washer arranging system are provided.