A semiconductor apparatus wherein a plurality of semiconductor modules (12, 14) each having one or more semiconductor elements each having first and second electrodes are stored in a case, the semiconductor modules each include a first terminal conductor for deriving a first electrode of each semiconductor element to an outside of the case, and a second terminal conductor for deriving a second electrode of each semiconductor element to the outside of the case, a first semiconductor module that includes one first terminal conductor and two second terminal conductors (17-1, 17-2) and a second semiconductor module that includes two first terminal conductors (18-1, 18-2) and one second terminal conductor face each other, the one first terminal conductor of the first semiconductor module is adjacent to the two first terminal conductors (18-1, 18-2) of the second semiconductor module, and the two second terminal conductors (17-1, 17-2) of the first semiconductor module are adjacent to the one second terminal conductor of the second semiconductor module, the plurality of modules within the case are connected in parallel to each other by a first external connection terminal that connects the first terminal conductors of the semiconductor modules to each other outside the case and a second external connection terminal that connects the second terminal conductors of the semiconductor modules to each other outside the case, the first external connection terminal, which covers the one first terminal conductor of the first semiconductor module and the two first terminal conductors (18-1, 18-2) of the second semiconductor module, is an electric conductor flat plate in a concave hexagonal shape, the second external connection terminal, which covers the first and second terminal conductors (17-1, 17-2) of the first semiconductor module and the first and second terminal conductors (18-1, 18-2) of the second semiconductor module, is an electric conductor flat plate in a rectangular shape, and an insulation part shaped to cover the first external connection terminal is provided between the first and second external connection terminals (32, 34). a plurality of semiconductor modules (12, 14) each having one or more semiconductor elements each having first and second electrodes are stored in a case, the semiconductor modules each include a first terminal conductor for deriving a first electrode of each semiconductor element to an outside of the case, and a second terminal conductor for deriving a second electrode of each semiconductor element to the outside of the case, a first semiconductor module that includes one first terminal conductor and two second terminal conductors (17-1, 17-2) and a second semiconductor module that includes two first terminal conductors (18-1, 18-2) and one second terminal conductor face each other, the one first terminal conductor of the first semiconductor module is adjacent to the two first terminal conductors (18-1, 18-2) of the second semiconductor module, and the two second terminal conductors (17-1, 17-2) of the first semiconductor module are adjacent to the one second terminal conductor of the second semiconductor module, the plurality of modules within the case are connected in parallel to each other by a first external connection terminal that connects the first terminal conductors of the semiconductor modules to each other outside the case and a second external connection terminal that connects the second terminal conductors of the semiconductor modules to each other outside the case, the first external connection terminal, which covers the one first terminal conductor of the first semiconductor module and the two first terminal conductors (18-1, 18-2) of the second semiconductor module, is an electric conductor flat plate in a concave hexagonal shape, the second external connection terminal, which covers the first and second terminal conductors (17-1, 17-2) of the first semiconductor module and the first and second terminal conductors (18-1, 18-2) of the second semiconductor module, is an electric conductor flat plate in a rectangular shape, and an insulation part shaped to cover the first external connection terminal is provided between the first and second external connection terminals (32, 34).