Mechanical pencil with ruler

The utility model discloses a mechanical pencil with a ruler, which comprises a mechanical pencil body. The mechanical pencil with the ruler is characterized in that a cross section of one end of a cylindrical container of the mechanical pencil body close to a pencil point is in a shape of a circle, thereby being convenient to be held by a hand. A cross section of the rest portion of the cylindrical container is in a shape of a quadrate, so that the mechanical pencil is not easy to roll on a desk. A groove for storing the ruler is arranged on a side wall of the quadrate cross section of the cylindrical container of the mechanical pencil body. The top of the groove is provided with a cover, and the groove is connected with the cover in a hinge joint mode. The cover is preferentially chosen as one portion of the side wall of the cylindrical container. Scales can be arranged on edges of the quadrate cross section of the cylindrical container of the mechanical pencil body. The mechanical pencil with the ruler can