In a package-storage type engine generator, a package (2) is partitioned into an upper section and a lower section. An engine (11) and a generator (12) are disposed in the lower section, and a radiator (42) and a radiator fan (43) are disposed in the upper section. An upper/lower partition member (32) partitions the package (2) into the upper section and the lower section. A portion of the upper/lower partition member (32), which faces the radiator fan (43), is formed in a downward inclined shape from a center portion to an outer edge portion of the package.