X-ray generation apparatus includes X-ray generation tube having cathode and anode, voltage supply for supplying voltage to the X-ray generation tube via conductive line, storage container including first portion forming first space storing the voltage supply, second portion forming second space having width smaller than that of the first space and storing the X-ray generation tube, and connecting portion connecting the first and second portions to form internal space in which the first space and the second space communicate, and insulating member arranged in the internal space to block shortest path between the conductive line and convex portion of the connecting portion. The insulating member is formed by connecting members by adhesive material, and is configured to block linear path between the adhesive material and the conductive line and linear path between the adhesive material and the cathode.