A holder for a vehicle holds various portable devices, such as cell phones and IT goods, by being firmly fixed to a grille of an air blowing hole by enabling four fixing bars to mechanically rotate according to the forward and backward movement of a pressurizing member such that one ends of the four fixing bars gather together or are separated from each other. The holder includes a housing having a through hole formed in the center of a front plate and four fixing bars. Each fixing bar has one end which protrudes to the front surface of the housing through the through hole so that the four fixing bars are inserted into a blowing hole and are supported on an air blowing hole grille, and another end having an arm that outwardly curves so that one side thereof is rotatably coupled to the inside of the front plate.