The utility model provides a portable cutting machine, it has: a housing. The saw bit, it sets up one side of said casing, the motor portion of accomodating, it sets up the messenger is accomodate to the opposite side of said casing the rotatory motor of saw bit, the handle, its extend along the front and back top of said casing, and both ends are linked to said casing, and the battery keeps the portion, and it sets up is following on the position that the said motor portion of accomodating was left, the installation conduct the battery of the power of motor, portable cutting machine's characterized in that, the one end of handle than position after the motor portion of accomodating leans on is linked to said casing, the battery keep the portion than position after the motor portion of accomodating leans on set up in said casing, portable cutting machine can make the surface of the motor portion of accomodating partly with the battery keep the portion or under the state of partly and the plane butt of the surface of said battery, place on this plane.