Surf board and adhesive film for surf board

The present invention provides a surfboard improved in a movement performance such as a speed or a change of direction, etc. at the time of sliding on water, as compared with a conventional surfboard. The surfboard is so constructed that a tough and soft synthetic resin film 7 having a surface smoothness and patterned along to the contour of the rear area 2 a of the water-contact bottom surface 2 of a surfboard 1 or the contour of both side faces 9 b and 9 b of a fin 9 is adhered either to the rear area 2 a of the water contact bottom surface 2 of the surfboard 1 or to both side faces 9 b and 9 b of the fin 9 attached thereto, or to both of the rear area 2 a and both side faces 9 b and 9 b of the fin 9, through an adhering agent such as a bonding agent or an adhesive agent. As the synthetic resin film 7 for adherence, such a one that a coated face 8 of the adhesive agent is applied to the rear surface thereof in advance is preferably used.