Cogeneration apparatus

A cogeneration apparatus (10) includes a housing (11) for accommodating an engine (16), a fuel line (24), an electrical generator (18), and a power converter part (22). The housing (11) is partitioned into a power-generation compartment (12) and an electrical-equipment compartment (13). Empty space in the housing (11) is used to form a concave part (55), which is indented from the electrical-equipment compartment (13) toward the power-generation compartment (12). The fuel line (24) is disposed in the concave part (55).