A bicycle carrier for a vehicle may include guide rails symmetrically disposed at both sides of a rear bumper beam and extending in a front-rear direction of the vehicle, a sliding rail including a panel and sides extending from the panel, and sliding forward and backward on the guide rails, an expanding link disposed between the sides of the sliding rails and including a plurality of links connected such that a lateral gap between the links increases, when a front-rear gap between the links decreases, support arms disposed on the expanding link to move laterally with the expanding link, slidably engaged with the sliding rails, and fixing a loaded bicycle, and an actuating unit fixed to the rear bumper beam, including a link assembly connected to the sliding rail and the expanding link, and providing power through the link assembly during operation to move the sliding rail and expand or contract the expanding link.