A print head includes a light guide portion including a light blocking part having a lattice shape, and a plurality of light guide paths defined by the light blocking part, and a light emitting element array in which a plurality of organic EL elements emitting light incident to each light guide path are arranged. In the print head, the plurality of light guide paths of the light guide portion are designed to have an identical width of 30 μm or less, and thus it is possible to reduce exposure unevenness which is one of exposure characteristics.