To stably fix a housing bag without any deflection in one direction by arranging a binding means installed to a carrier, which is arranged on a roof of an automobile, in the predetermined direction and a binding means fixing member formed at least one position in the housing bag.

In a carrier C, a rope extended orthogonally to the advancing direction of a vehicle body V is installed. On the other hand, on the surface of a housing bag B, rope fixing members B1, which are made of the end parts of narrow long cloth material, are sewn up in four positions in the side edge parts in the longitudinal direction so as to be lined up in two lines. The housing bag B housing a surfboard S is placed on the carrier C along the advancing direction of the vehicle body V, and the rope R is passed beneath the rope fixing members B1 so as to fix the surfboard S to the carrier C with the bag B.