Disclosed is a phototherapy device. The phototherapy device comprises a circuit substrate, a light source and a diffusion module through which light rays can pass. The light source is arranged on a main surface of the circuit substrate. The circuit substrate is used for providing a working power source for the light source, so that the light source can emit light rays towards a direction which is far away from the main surface. The diffusion module is arranged at one side which the main surface faces, so that the light rays emitted from the light source can firstly pass through the diffusion module before arriving at a phototherapy area. The diffusion module is of a material through which light rays can pass. The diffusion module can diffuse the light rays that pass through the diffusion module, so that an emergence angle when the light rays emitted from the light source are emitted from the diffusion module is greater than an incidence angle when the light rays emitted from the light source are emitted into the diffusion module. By means of a diffusion module diffusing light rays emitted from a light source, a light-emitting surface, emitting the light rays, of the light source is more uniform, and it is less possible to form converged light spots in a phototherapy area, thereby improving the user experience.Linvention concerne un équipement de luminothérapie comprenant une carte de circuit imprimé, une source de lumière et un module de diffusion susceptible de pénétrer la lumière, la surface principale de la carte de circuit imprimé présentant une source de lumière et étant destinée à acheminer celle-ci vers une source dalimentation opérationnelle de telle sorte que la source de lumière émette une lumière diffusée séloignant de la surface principale. Le module de diffusion est placé sur un côté orienté vers la surface principale de manière à former un matériau pénétrable par la lumière avant que la lumière émise par la source de lumière natteigne la région à trait
