The invention relates to a light source module, an illumination device, and a moving body. A light source module capable of suppressing reduction of visibility by relieving deformation of an outer contour shape of an illuminated image caused by influence of distortion of a projection lens is disclosed. The light source module includes a substrate, and multiple light sources mounted on the substrate and arranged in a row direction and a column direction. The light sources include a set of light sources arranged in the row direction and a set of light sources arranged in the column direction. The set of light sources arranged in the row direction includes more light sources than the set of light sources arranged in the column direction. Further, spacings between light sources included in theset of light sources arranged in the row direction are unequally set. Also, spacings between light sources included in the set of light sources arranged in the column direction are unequally set.