Disclosed is a catalyst supplier. The disclosed catalyst supplier includes: a catalyst storage unit of storing a catalyst; and a catalyst measuring unit which is installed to be connected with the catalyst storage unit and quantitatively inputs a catalyst supplied from the catalyst storage unit into a reactor through an outlet, wherein the catalyst measuring unit may include: a spherical body valve which is rotatably installed through a driving unit and has at least one installing groove along a rotational circumferential direction; and a catalyst receiving member which has a receiving groove receiving a predetermined amount of a catalyst and is detachably installed to the installing groove in the valve body.
