A power storage module comprising: a stack in which power storage cells are stacked in a first direction; an end plate provided at each of both ends of the stack in the first direction; and a restraint member in abutment with the end plate in the first direction, wherein the restraint member includes a plate-shaped portion extending in the first direction, and a contact plate portion joined to the plate-shaped portion by a plurality of joining portions arranged side by side in a second direction orthogonal to the first direction, the contact plate portion being in abutment with the end plate, a plurality of first protrusions each protruding from one of the end plate and the contact plate portion toward the other of the end plate and the contact plate portion are provided side by side in the second direction on an abutment surface between the end plate and the contact plate portion, each of the plurality of first protrusions has a top portion at a tip of the first protrusion with a width of the first protrusion in the second direction being narrower in a direction from the one of the end plate and the contact plate portion toward the other of the end plate and the contact plate portion, and each of the plurality of first protrusions is in abutment with the other of the end plate and the contact plate portion at the top portion, and the plurality of first protrusions include a first protrusion having a top portion overlapping with any one joining portion of the plurality of joining portions when viewed in the first direction. a stack in which power storage cells are stacked in a first direction; an end plate provided at each of both ends of the stack in the first direction; and a restraint member in abutment with the end plate in the first direction, wherein the restraint member includes a plate-shaped portion extending in the first direction, and a contact plate portion joined to the plate-shaped portion by a plurality of joining portions arranged side by side in a second direction orthogonal to the first direction, the contact plate portion being in abutment with the end plate, a plate-shaped portion extending in the first direction, and a contact plate portion joined to the plate-shaped portion by a plurality of joining portions arranged side by side in a second direction orthogonal to the first direction, the contact plate portion being in abutment with the end plate, a plurality of first protrusions each protruding from one of the end plate and the contact plate portion toward the other of the end plate and the contact plate portion are provided side by side in the second direction on an abutment surface between the end plate and the contact plate portion, each of the plurality of first protrusions has a top portion at a tip of the first protrusion with a width of the first protrusion in the second direction being narrower in a direction from the one of the end plate and the contact plate portion toward the other of the end plate and the contact plate portion, and each of the plurality of first protrusions is in abutment with the other of the end plate and the contact plate portion at the top portion, and the plurality of first protrusions include a first protrusion having a top portion overlapping with any one joining portion of the plurality of joining portions when viewed in the first direction.