A hybrid vehicle comprises a drive wheel (5), an internal combustion engine
(1), a power generating motor (2) that generates an electric power
by using an output power of the engine (1), and a planetary gear set (13)
that comprises a combination of a gear element that is driven by the engine (1),
a gear element that is connected to the power generating motor (2), and
a gear element that is connected to the drive wheel (5). A target engine
power is computed based on an accelerator operation amount. The engine (1)
is controlled based on the target engine power. And control a rate of variation
in the rotation speed of the engine (1) to be smaller, when the rotation
speed of the power generating motor (2) increases than when the rotation
speed of the power generating motor (2) decreases toward zero as a result
of controlling the engine (1) based on the target engine power. Fuel consumption
rate is thus improved.