Slack absorber of wire harness

In a slack absorber of wire harness structured such that a leaf spring (29) to which a proximal portion (129) is mounted and a wire harness(32) arranged along the leaf spring (29) within a protector case (21), a support portion (26) having a clamp groove (26a) to which the proximal portion (129) of the leaf spring (29) is inserted is provided in a protector base (23), a pressing portion (27) pressing a proximal portion (29a) of the leaf spring (29) which is clamped by the support portion (26) is provided in a protector cover (24). and the proximal portion (29a) of the elastic member (29) is fixed to the support portion (26) and the pressing portion (27) in a state in which the protector base (24) and the protector cover (23) are combined.