A control apparatus for a hybrid construction machine includes an engine, a motor generator driven by the engine and capable of generating electric power, a hydraulic pump driven by total torque of the engine and the motor generator, a power storage device, an inverter, a filter that collects a particulate material in exhaust gas of the engine, and a control section outputting a command signal for controlling powering operation or regeneration operation of the motor generator. The control apparatus further includes a powering operation limitation section that inputs thereto an ordinary torque command calculated by a torque command value calculation section and a demand signal for regeneration of the filter decided by a filter regeneration decision section and calculates the command signal in response to the input signals. When a filter regeneration demand signal is available, a command signal for limiting the powering operation of the motor generator is calculated.