Load carrier (1) for transporting a bicycle (2) and which is designed for being mounted to a vehicle roof (4) by means of mounting devices (3). The load carrier includes a longitudinal rail section (5) provided with connecting devices (14,15) for connection to the mounting devices and securing devices (6) for securing the wheels (7,8) of the loaded bicycle, a retaining arm (16) pivotable arranged relative to the rail and provided with a claw grip (17) having a first and a second jaw (18 and 19 respectively) which jaws are lateral (T) to the longitudinal direction of the rail section (L) and arranged so as to form a gap (51) facing the side (S) of the longitudinal rail section from which side the bicycle is loaded. The retaining arm is arranged so that it can be turned to a position in which the claw grip can be connected to the frame (51) of the loaded bicycle when the bicycle is raised into the upright position, and in which position the claw grip can be tightened about the frame to hold the loaded bicycle in the upright position. The longitudinal direction (A-A) of the longitudinal rail section (5), in the area of one wheel (7 or 8) of a bicycle loaded thereon is arranged at an angle (.alpha.) relative to the longitudinal direction (B-B) of the rail section in the area of the second wheel of the bicycle which causes the bicycle to move along the rail section so that the frame (52) of the bicycle enters into active engagement with at least one of the jaws (18, 19) of the claw grip (17) and thereby ensures that the bicycle remains in the upright position even if the claw grip (17) is not tightened.