Provided is a resin-made impact absorption member including: an impact absorption portion which includes a fiber-reinforced resin material containing reinforcing fibers and a thermoplastic resin and has a hollow structure including an outer cylindrical portion and a hollow portion, in which the reinforcing fiber has an average fiber length of 1 mm to 100 mm, the thermoplastic resin has a fracture elongation of 10% or more, the fiber-reinforced resin material has a compressive elastic modulus of 10 GPa or more and a compressive strength of 150 MPa to 500 MPa, and in the impact absorption portion, a maximum value of a ratio L1/t1 of a distance L1 from a position of the center of gravity to the outer cylindrical portion on a same section in a sectional shape in a direction orthogonal to an impact absorption direction, to a thickness t1 of the outer cylindrical portion, is 40 or less.