To provide a portable electric saw capable of stabilizing the cutting work irrespective of use of a long blade in a place having only a very small depth without causing a trouble in usual cutting.

This portable electric saw includes a motor, a reciprocating conversion mechanism for converting rotation of the motor into reciprocating movement, a saw blade 5 reciprocated and driven by the reciprocating conversion mechanism, a base 3 extended in substantially vertical direction to the saw blade, and a subbase 6 connected with the base 3 and protruding forward from the base 3.