Disclosed is a sensor holder for an intraoral X-ray sensor including a front surface receiving incident x-rays, a rear surface, and a fastener, including a coupler including a grip fitted over a side surface of the fastener to enclose the same, and a support connected to the grip and facing in a forward direction of the intraoral X-ray sensor while covering the rear surface and a side surface of the intraoral X-ray sensor, a connector connected to the support and extending in the forward direction of the intraoral X-ray sensor, and a handle connected to the connector, wherein the coupler is made of a synthetic resin material with a first hardness (L1), and at least one of the connector and the handle is made of a synthetic resin material with a second hardness (L2) greater than the first hardness.
