The present invention relates to a method of fabricating a radiation detector comprising a photosensitive sensor assembly (1, 4), a scintillator (6) that converts the radiation into radiation to which the photosensitive sensor assembly (1, 4) is sensitive, the scintillator (6) being fastened by adhesive bonding to the sensor assembly, the sensor assembly comprising a substrate (4) and several attached sensors (1), the sensors (1) each having two faces (11, 12), a first face (11) of which is bonded to the substrate (4) and a second face (12) of which is bonded to the scintillator (6). The method consists in linking the following operations: the sensors (1) are deposited via their second face (12) on an adhesive film (13); and the sensors (1) are bonded via their first face (11) to the substrate (4).