A tolerance absorbing structure of a first power supply distribution box includes a connection terminal to which one end part of a flat distribution member is connected and fixed; a storage case including a connection opening member into which the connection terminal is inserted and fixed to a vehicle body; an elastic support member configured to support the connection terminal freely movably in a three-dimensional direction with respect to the connection opening member; and a flexible conductor configured to connect a substrate connection part of a circuit conductor stored in the storage case and the connection terminal with an extra length.