A brush cutter, comprising: a control rod; a rotatable blade disposed on an end of the control rod; a protection cover disposed so as to cover a part of the blade 4); and an engine disposed on the other end of the control rod, the engine comprising; a cylinder; a piston forming a combustion chamber with the cylinder; a crank shaft for converting reciprocating motion of the piston into rotational motion; and a fuel tank, the-fuel tank comprising: a fuel tank body for accommodating fuel of the engine; and at least one elastic member disposed on a bottom surface of the fuel tank body, wherein the at least one elastic member includes at least one protruding portion protruding downward and having a contact surface suitable to be in contact with ground and functioning as a pedestal portion of the fuel tank, the at least one elastic member having an asymmetric shape with respect to the central position of the elastic member (C1, C2) in at least one of an axial direction of the crank shaft of the engine referred to as front-rear direction or a horizontal direction orthogonal to the front-rear direction and referred to as right-left direction, and wherein, defining that a front direction is an output side of the crank shaft in the front-rear direction, the protruding portion includes: a front surface formed on a front side in the front-rear direction; and a rear surface formed on a rear side in the front-rear direction, and an inclination angle (θ f) of the front surface with respect to a vertical direction is different from an inclination angle (θ b) of the rear surface with respect to the vertical direction. a control rod; a rotatable blade disposed on an end of the control rod; a protection cover disposed so as to cover a part of the blade 4); and an engine disposed on the other end of the control rod, the engine comprising; a cylinder; a piston forming a combustion chamber with the cylinder; a crank shaft for converting reciprocating motion of the piston into rotational motion; and a fuel tank, the-fuel tank comprising: a fuel tank body for accommodating fuel of the engine; and at least one elastic member disposed on a bottom surface of the fuel tank body, wherein the at least one elastic member includes at least one protruding portion protruding downward and having a contact surface suitable to be in contact with ground and functioning as a pedestal portion of the fuel tank, the at least one elastic member having an asymmetric shape with respect to the central position of the elastic member (C1, C2) in at least one of an axial direction of the crank shaft of the engine referred to as front-rear direction or a horizontal direction orthogonal to the front-rear direction and referred to as right-left direction, and wherein, defining that a front direction is an output side of the crank shaft in the front-rear direction, the protruding portion includes: a front surface formed on a front side in the front-rear direction; and a rear surface formed on a rear side in the front-rear direction, and an inclination angle (θ f) of the front surface with respect to a vertical direction is different from an inclination angle (θ b) of the rear surface with respect to the vertical direction. a fuel tank body for accommodating fuel of the engine; and at least one elastic member disposed on a bottom surface of the fuel tank body, wherein the at least one elastic member includes at least one protruding portion protruding downward and having a contact surface suitable to be in contact with ground and functioning as a pedestal portion of the fuel tank, the at least one elastic member having an asymmetric shape with respect to the central position of the elastic member (C1, C2) in at least one of an axial direction of the crank shaft of the engine referred to as front-rear direction or a horizontal direction orthogonal to the front-rear direction and referred to as right-left direction, and wherein, defining that a front direction is an output side of the crank shaft in the front-rear direction, the protruding portion includes: a front surface formed on a front side in the front-rear direction; and a rear surface formed on a rear side in the front-rear direction, and an inclination angle (θ f) of the front surface with respect to a vertical direction is different from an inclination angle (θ b) of the rear surface with respect to the vertical direction. a front surface formed on a front side in the front-rear direction; and a rear surface formed on a rear side in the front-rear direction, and an inclination angle (θ f) of the front surface with respect to a vertical direction is different from an inclination angle (θ b) of the rear surface with respect to the vertical direction.