A glass run for guiding a door glass lifting or lowering in a ditch, which is fittable along a frame having a substantially U-shape in cross section of an automobile door, the glass run comprising: a body having a substantially U-shape in cross-section including an inner-cabin side wall, an outer-cabin side wall and a connecting wall which connects the side walls (22, 23); an inner lip which is extending toward said connecting wall side from an outer-cabin side surface of said inner-cabin side wall and slidably brought into contact with said door glass; and an outer lip which is extending toward an inner-cabin side from an inner side surface of an end position of said outer-cabin side wall and slidably brought into contact with said door glass, the outer lip being forked into an inner-attaching lip which extends toward said connecting wall side from an inner-cabin side surface of the end position of said outer-cabin side wall and faces said inner lip and an outer-attaching lip which is substantially perpendicular to a direction in which the inner-attaching lip extends from a base root of the inner-attaching lip and extending toward an opposite side to said connecting wall side; wherein: said inner lip is substantially S shaped in cross section, of which one interval between a base root and an intermediate part is swelled and curved toward said inner-cabin side wall side and another interval between the intermediate part and a top end of said inner lip is swelled and curved toward said outer-cabin side wall side; before said door glass is guided into said ditch, a displacement point on a surface on an opposite side to said connecting wall side of said inner lip, on which a direction of a curve of said inner lip changes, is on said connecting wall side compared with a top end of the outer-attaching lip of said outer lip; characterized in that a folding point is formed by thinning thickness of said connecting wall side of the base root of said inner-attaching lip or by forming a notch from an inner-cabin side for turning said inner-attaching lip toward said connecting wall side; thickness of the base root of said inner-attaching lip is thicker than the thickness on said folding point and thickness of the base root of said outer-attaching lip is thinner than thickness of the top end of the outer-attaching lip; and when said door glass is guided into said ditch and slidably brought into contact with said inner-attaching lip, the inner-attaching lip turns toward said connecting wall side around said folding point, said outer-attaching lip approaches said door glass side and is slidably brought into contact with the door glass following movement of said inner-attaching lip, and the top end of said outer-attaching lip bends and moves toward an opposite side to said connecting wall side along said door glass. said inner lip is substantially S shaped in cross section, of which one interval between a base root and an intermediate part is swelled and curved toward said inner-cabin side wall side and another interval between the intermediate part and a top end of said inner lip is swelled and curved toward said outer-cabin side wall side; before said door glass is guided into said ditch, a displacement point on a surface on an opposite side to said connecting wall side of said inner lip, on which a direction of a curve of said inner lip changes, is on said connecting wall side compared with a top end of the outer-attaching lip of said outer lip; characterized in that a folding point is formed by thinning thickness of said connecting wall side of the base root of said inner-attaching lip or by forming a notch from an inner-cabin side for turning said inner-attaching lip toward said connecting wall side; thickness of the base root of said inner-attaching lip is thicker than the thickness on said folding point and thickness of the base root of said outer-attaching lip is thinner than thickness of the top end of the outer-attaching lip; and when said door glass is guided into said ditch and slidably brought into contact with said inner-attaching lip, the inner-attaching lip turns toward said connecting wall side around said folding point, said outer-attaching lip approaches said door glass side and is slidably brought into contact with the door glass following movement of said inner-attaching lip, and the top end of said outer-attaching lip bends and moves toward an opposite side to said connecting wall side along said door glass.