To provide an inexpensive control circuit for a power converter which generates a current command value synchronized with AC power voltage without detecting AC power voltage.

This control circuit for a power converter is connected with an AC power source 1 via a reactor 2, and in which a drive command to a switching element for a power converter 3 is outputted directly from the deviation between an AC current command value Isref and an AC current IS. In this case, this obtains a signal geared to the AC output voltage VA of the power converter 3 by the drive command to the switching element for the power converter 3. This control circuit inputs this signal into a phase synchronizing control circuit 33, generates a sin signal and a cos signal from the output of the phase synchronizing control circuit 33, and increases the cos signal by factors of coefficient to make it into a signal corresponding to the amount of voltage drop of the reactor 2. Furthermore, this makes an AC current command value Isref from a signal where this is added to the sin signal.