An electronic device housing comprising constituent members in which one of the constituent members is formed with an injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) having a joint face (JAB, JCD) at which a first thermoplastic resin member and a second thermoplastic resin member are joined via lateral end faces (SEA, SEC) of both the resin members by injection-molding the second thermoplastic resin member to the lateral end face (SEA, SEC) of the first thermoplastic resin member, wherein (a) a joint line (JL1, JL4) drawn by an intersection between the longitudinal cross section (LCS1, LCS4) of the injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) and the joint face (JAB, JCD) consists of a first joint line segment (1a, 4a) extending from the front surface (FS1, FS4) of the injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) into inside and having an end inside, a second joint line segment (1b, 4b) extending from the back surface (BS1, BS4) of the injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) into inside and having an end inside, and a third joint line segment (1ab, 4ab) connecting the end of the first joint line segment (1a, 4a) and the end of the second joint line segment (1b, 4b); and (b-1) as regards the directions of the respective joint line segments (4a,4ab,4b) with respect to the normal line to the front surface or back surface of the first thermoplastic resin member, the directions of the respective joint line segments (4a, 4ab, 4b) are different from each other, and the direction of the third joint line segment inclines to the normal line, or (b-2) as regards the directions of the respective joint line segments (1a, 1ab, 1b) with respect to the normal line to the front surface or back surface of the first thermoplastic resin member, the directions of the first joint line segment and the second joint line segment are identical to each other, and the directions of the first joint line segment and the third joint line segment are different from each other, while the direction of the third joint line segment inclines to the normal line; wherein the first thermoplastic resin member and the second thermoplastic resin member contain the same resin component and wherein: the first thermoplastic resin member contains reinforcing non-conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 0 to 10 dB, and the second thermoplastic resin member contains reinforcing conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 30 to 120 dB or the second thermoplastic resin member contains reinforcing non-conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 0 to 10 dB, and the first thermoplastic resin member contains reinforcing conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 30 to 120 dB. (a) a joint line (JL1, JL4) drawn by an intersection between the longitudinal cross section (LCS1, LCS4) of the injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) and the joint face (JAB, JCD) consists of a first joint line segment (1a, 4a) extending from the front surface (FS1, FS4) of the injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) into inside and having an end inside, a second joint line segment (1b, 4b) extending from the back surface (BS1, BS4) of the injection molded article (IMA1, IMA2, IMA3, IMA4, IMA5, IMA6) into inside and having an end inside, and a third joint line segment (1ab, 4ab) connecting the end of the first joint line segment (1a, 4a) and the end of the second joint line segment (1b, 4b); and (b-1) as regards the directions of the respective joint line segments (4a,4ab,4b) with respect to the normal line to the front surface or back surface of the first thermoplastic resin member, the directions of the respective joint line segments (4a, 4ab, 4b) are different from each other, and the direction of the third joint line segment inclines to the normal line, or (b-2) as regards the directions of the respective joint line segments (1a, 1ab, 1b) with respect to the normal line to the front surface or back surface of the first thermoplastic resin member, the directions of the first joint line segment and the second joint line segment are identical to each other, and the directions of the first joint line segment and the third joint line segment are different from each other, while the direction of the third joint line segment inclines to the normal line; the first thermoplastic resin member contains reinforcing non-conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 0 to 10 dB, and the second thermoplastic resin member contains reinforcing conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 30 to 120 dB or the second thermoplastic resin member contains reinforcing non-conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 0 to 10 dB, and the first thermoplastic resin member contains reinforcing conductive fibers and has an electric field shielding ability in the 1 GHz frequency band by the KEC method ranging from 30 to 120 dB.