To mount a seal material for sealing between a fixed glass pane and a window frame without providing a hard material and a soft material on the glass and causing rattling.SOLUTION: A seal material 10 is provided with an upper plate part 11 fixed to a mounting plate part 112, a lower plate part 12 arranged below the mounting plate part 112, and a connection plate part 13 extending to a cabin outer end part of the lower plate part 12 from a cabin outer end part of the upper plate part 11. The lower plate part 12 is provided with an end face seal lip part 19. The end face seal lip part 19 is elastically deformed in a state where the seal material 10 is mounted on the mounting plate part 112 so that a tip in a projection direction is positioned on a cabin outside compared to time before mounting, and is brought into contact with an upper end part of a fixed glass pane G2.SELECTED DRAWING: Figure 2