A power converter comprising: a power module having a plurality of plate-shaped electrodes (105T, 106T, 107u, 107v, 107w); a plurality of plate-shaped conductors (108, 109, 126u, 126v, 126w) connected to the plate-shaped electrodes of the power module respectively; and a casing having a lid (FIG. 11) and storing the power module and the plate-shaped conductors (108, 109, 126u, 126v, 126w), wherein the power module is mounted at the bottom of the casing and comprises at least one of male screws having flanges, the flange portions of the male screws are embedded in the plate-shaped electrodes (105T, 106T, 107u, 107v, 107w), the screw portions of the male screws project towards the lid, the plurality of the plate-shaped conductors (108, 109, 126u, 126v, 126w) are formed therein with corresponding holes at positions corresponding to the male screws, the male screws are inserted into the corresponding holes, located therein, and tightened in corresponding nuts to cause the plate-shaped conductors to be electrically connected to the plate-shaped electrodes wherein the power module comprises a power module base and a case mounted on the power module base, wherein the case comprises a base unit comprising an insulating component and integrally formed with the case, and the plate-shaped electrodes comprise an AC-side main electrode (107v, 107u, 107w) mounted on the case and formed to be extruded from the case, wherein at least one of the plate-shaped electrodes is projected from the side wall of the case toward the side thereon, wherein the flange portions of the male screws are embedded into recesses provided in the plate-shaped electrodes (105T, 106T, 107u, 107v, 107w) so that the screw portions of the male screws project away from the base, wherein the base unit is formed between the at least one of the plate-shaped electrodes (105T, 106T, 107u, 107v, 107w) and the casing, and wherein the base unit is formed along a surface of at least one of the plate-shaped electrodes (105T, 106T, 107u, 107v, 108w) projected from the side wall of the case opposite to a surface from which the screw portions of the male screws project away. a power module having a plurality of plate-shaped electrodes (105T, 106T, 107u, 107v, 107w); a plurality of plate-shaped conductors (108, 109, 126u, 126v, 126w) connected to the plate-shaped electrodes of the power module respectively; and a casing having a lid (FIG. 11) and storing the power module and the plate-shaped conductors (108, 109, 126u, 126v, 126w), wherein the power module is mounted at the bottom of the casing and comprises at least one of male screws having flanges, the flange portions of the male screws are embedded in the plate-shaped electrodes (105T, 106T, 107u, 107v, 107w), the screw portions of the male screws project towards the lid, the plurality of the plate-shaped conductors (108, 109, 126u, 126v, 126w) are formed therein with corresponding holes at positions corresponding to the male screws, the male screws are inserted into the corresponding holes, located therein, and tightened in corresponding nuts to cause the plate-shaped conductors to be electrically connected to the plate-shaped electrodes wherein the power module comprises a power module base and a case mounted on the power module base, wherein the case comprises a base unit comprising an insulating component and integrally formed with the case, and the plate-shaped electrodes comprise an AC-side main electrode (107v, 107u, 107w) mounted on the case and formed to be extruded from the case, wherein at least one of the plate-shaped electrodes is projected from the side wall of the case toward the side thereon, wherein the flange portions of the male screws are embedded into recesses provided in the plate-shaped electrodes (105T, 106T, 107u, 107v, 107w) so that the screw portions of the male screws project away from the base, wherein the base unit is formed between the at least one of the plate-shaped electrodes (105T, 106T, 107u, 107v, 107w) and the casing, and wherein the base unit is formed along a surface of at least one of the plate-shaped electrodes (105T, 106T, 107u, 107v, 108w) projected from the side wall of the case opposite to a surface from which the screw portions of the male screws project away.