To facilitate separation of a release sheet in a double-sided adhesion tape during fitting for improving fitting workability in a weather strip using a clip and the double-sided adhesion tape together.

This weather strip 10 is provided with a mounting base part 20 installed to a door frame 3 and a seal part 22 protruding from the mounting base part 20 to be compressed between it and a vehicle body upon closing a door. For installing the mounting base part 20 to the door by means of the clip 40 and the double-sided adhesion tape 50 in a roof part in the door circumference part, the mounting base part 20 is provided with a clip mounting face 20a mounting the clip 40 and a tape mounting face 20b mounting the double- sided adhesive tape 50 on the outer side beyond the clip mounting face. The tape mounting face 20b is tilted toward the vehicle body side by a predetermined angle θ in comparison with the clip mounting face 20a.