PURPOSE: To ensure sufficiently seal surface and seal pressure for preventing positively a car room from intrusion of rain water or the like in a drip receiver by forming a horizontally extending projection on the upper peripheral edge of a welt against which a weather strip is elastically pressed when a lid is closed.

CONSTITUTION: A roof removably attached to a vehicle comprises an opening 2 formed in a roof panel 1 and a lid 3 removably fitted in said opening 2. The roof opening 2 is formed on the peripheral edge with a drip receiver 9 which comprises a L-shaped flange 14 provided on the roof panel 1 and a reinforcement 15 fixed thereto. A weather strip 4 is provided on the lower surface of the lid 3, while an welt 6 is fitted in the whole periphery of the inner end riser portion 10 of the drip receiver 9. In this case, the welt 6 is formed on the upper end with a projection 11 projecting toward the drip receiver 9 side around the whole periphery and the upper surface of the projection provides a horizontal surface12. Thus, seal pressure is ensured over the whole area of the horizontal surface 12 to improve sealing property.