Disclosed is a phone holder, comprising a vertical wall, a base, and a clamping slot in the vertical wall for positioning a phone. A bottom surface of the clamping slot has an inclined surface in contact with the edge of the phone, such that the phone automatically slides to a clamping and positioning position when placed in the clamping slot, thus making it very convenient to place or access the phone. In addition, when the phone slides to the clamping and positioning position in the clamping slot, three contact points can be formed with an internal surface of the clamping slot, and the three contact points can form a three-point clamping and positioning effect for the phone, such that the phone can still be stably fixed in the holder in the case where the phone holder is shaking.