A glass run channel includes a run channel main body including a bottom wall portion, an interior lateral wall portion, and an exterior lateral wall portion, and an interior seal lip and an exterior seal lips. At least one lateral wall portion and the bottom wall portion are formed from a sponge material. At least one lateral wall connecting portion among an interior lateral wall connecting portion and an exterior lateral wall connecting portion is formed from the sponge material thinner than the interior lateral wall portion, the exterior lateral wall portion, and the bottom wall portion so as to be capable of being bent when being mounted on the window frame. An outer peripheral side of the lateral wall connecting portion formed from the sponge material is covered with a covering portion made of a solid material.