Reciprocating pump, which comprises: - a casing provided with one or more guide jackets, each of which defines a corresponding guide seat extended along a corresponding radial direction; - one or more heads, each of which is mounted on said casing at a respective said guide seat and at least partially defines a pumping chamber, - one or more membranes, each of which delimits one said pumping chamber; - actuation means, which are housed in a containment chamber defined internally by said casing and comprise: - one or more pistons, each of which carries fixed thereto a corresponding said membrane and is susceptible of guidedly sliding in a corresponding said guide seat between a release position, in which the corresponding said membrane expands the volume of the pumping chamber and a compression position, in which said membrane reduces the volume of said pumping chamber; - a drive shaft carrying fixed thereto at least one thrust cam, which is in abutment against each said piston and is actuatable to rotate around a rotation axis thereof in order to move each said piston from said release position to said compression position; said reciprocating pump being characterized in that said actuation means also comprise: - one or more rocker arms, each of which is rotatably connected to said casing by means of a pin and is provided with a first lever arm acting on a corresponding said piston and a second lever arm opposite said first lever arm with respect to said pin; - at least one return cam, which is fixed on said drive shaft and is actuatable to rotate around said rotation axis in order to move each said rocker arm around the corresponding said pin; each said rocker arm being movable between an operative position, in which said return cam acts against said second lever arm in order to return, by means of the corresponding said first lever arm, said piston to slide from said compression position towards said release position, and a non-operative position, in which said return cam releases said second lever arm in order to free said piston to slide from said release position towards said compression position. - a casing provided with one or more guide jackets, each of which defines a corresponding guide seat extended along a corresponding radial direction; - one or more heads, each of which is mounted on said casing at a respective said guide seat and at least partially defines a pumping chamber, - one or more membranes, each of which delimits one said pumping chamber; - actuation means, which are housed in a containment chamber defined internally by said casing and comprise: - one or more pistons, each of which carries fixed thereto a corresponding said membrane and is susceptible of guidedly sliding in a corresponding said guide seat between a release position, in which the corresponding said membrane expands the volume of the pumping chamber and a compression position, in which said membrane reduces the volume of said pumping chamber; - a drive shaft carrying fixed thereto at least one thrust cam, which is in abutment against each said piston and is actuatable to rotate around a rotation axis thereof in order to move each said piston from said release position to said compression position; - one or more pistons, each of which carries fixed thereto a corresponding said membrane and is susceptible of guidedly sliding in a corresponding said guide seat between a release position, in which the corresponding said membrane expands the volume of the pumping chamber and a compression position, in which said membrane reduces the volume of said pumping chamber; - a drive shaft carrying fixed thereto at least one thrust cam, which is in abutment against each said piston and is actuatable to rotate around a rotation axis thereof in order to move each said piston from said release position to said compression position; said reciprocating pump being characterized in that said actuation means also comprise: - one or more rocker arms, each of which is rotatably connected to said casing by means of a pin and is provided with a first lever arm acting on a corresponding said piston and a second lever arm opposite said first lever arm with respect to said pin; - at least one return cam, which is fixed on said drive shaft and is actuatable to rotate around said rotation axis in order to move each said rocker arm around the corresponding said pin; - one or more rocker arms, each of which is rotatably connected to said casing by means of a pin and is provided with a first lever arm acting on a corresponding said piston and a second lever arm opposite said first lever arm with respect to said pin; - at least one return cam, which is fixed on said drive shaft and is actuatable to rotate around said rotation axis in order to move each said rocker arm around the corresponding said pin; each said rocker arm being movable between an operative position, in which said return cam acts against said second lever arm in order to return, by means of the corresponding said first lever arm, said piston to slide from said compression position towards said release position, and a non-operative position, in which said return cam releases said second lever arm in order to free said piston to slide from said release position towards said compression position.