A fuel cell includes a power generating body (10) including a membrane electrode assembly, a resin frame (20) placed around the power generating body, and a pair of separators laminated on the resin frame so as to sandwich the power generating body (10) and the resin frame. The resin frame (20) has a resin-frame-side manifold (30a) in which reaction gas flows in a direction passing through the resin frame (20), an opening (21) that holds the power generating body (10), and a gas introduction channel (50) formed through the resin frame (20) between the resin-frame-side manifold (30a) and the opening (21). Each separator has a separator-side manifold (30b) through which the reaction gas flows, and which is provided at a position corresponding to the resin-frame-side manifold (30a) in a lamination direction, and the gas introduction channel (50) has a gas introduction part (51) that extends into the separator-side manifold (30b), when viewed in the lamination direction.