A portable radiographic image capturing apparatus includes a casing having a front face including a top plate and a rear face. The rear face is fitted in the front face such that second sides of the rear face are disposed inside of first sides of the front face. Water-resistant members are disposed in corner portions that are formed in the front face. The second sides have ridges for pressing and elastically deforming the water-resistant members toward the top plate. The ridges have slanted outer side surfaces.
