An X-ray generation apparatus comprising: an X-ray generation tube including a cathode having an electron emitting portion configured to emit electrons in a first direction, and an anode including a target configured to generate X-rays upon collision of the electrons radiated from the electron emitting portion; a voltage supply configured to supply a voltage to the X-ray generation tube via a conductive line; a storage container including a first portion forming a first space that stores the voltage supply, a second portion forming a second space whose width in a second direction orthogonal to the first direction is smaller than that of the first space and which stores the X-ray generation tube, and a connecting portion connecting the first portion and the second portion to each other to form an internal space in which the first space and the second space communicate, the connecting portion including a convex portion pointed toward the internal space; and an insulating member arranged in the internal space to surround at least a portion of at least one of the conductive line and the cathode, wherein the insulating member is arranged to block at least the shortest path between the conductive line and the convex portion, characterized in that the insulating member has a structure formed by connecting at least two members (121, 122) by an adhesive material, and is configured to block a linear path between the adhesive material and the conductive line and a linear path between the adhesive material and the cathode, and the at least two members (121, 122) include a tubular portion, and a flange portion extending outward from the tubular portion. an X-ray generation tube including a cathode having an electron emitting portion configured to emit electrons in a first direction, and an anode including a target configured to generate X-rays upon collision of the electrons radiated from the electron emitting portion; a voltage supply configured to supply a voltage to the X-ray generation tube via a conductive line; a storage container including a first portion forming a first space that stores the voltage supply, a second portion forming a second space whose width in a second direction orthogonal to the first direction is smaller than that of the first space and which stores the X-ray generation tube, and a connecting portion connecting the first portion and the second portion to each other to form an internal space in which the first space and the second space communicate, the connecting portion including a convex portion pointed toward the internal space; and an insulating member arranged in the internal space to surround at least a portion of at least one of the conductive line and the cathode, wherein the insulating member is arranged to block at least the shortest path between the conductive line and the convex portion, characterized in that the insulating member has a structure formed by connecting at least two members (121, 122) by an adhesive material, and is configured to block a linear path between the adhesive material and the conductive line and a linear path between the adhesive material and the cathode, and the at least two members (121, 122) include a tubular portion, and a flange portion extending outward from the tubular portion.