A method for manufacturing a filter needle for a syringe is disclosed. A method of manufacturing a filter needle for a syringe according to an embodiment of the present invention includes a bulk needle supplying step S110 for supplying a bulk needle 50 without a filter to a hub, A protective cap separating step S120 for separating the hub 30 of the bulk needle 50 supplied from the bulk needle supplying step S110 and the protective cap 40, A fusing step S140 for fusing the filter 60 inserted in the hub 30 using the ultrasonic welding apparatus 140 and a fusing step S140 for fusing the filter 60 inserted into the hub 30 using the ultrasonic welding apparatus 140, A needle inspection step S150 for confirming whether or not a needle of the hub 30 to which the filter 60 is welded is abnormal, a protective cap assembling step S160 for assembling the protective cap 40 and the hub 30, A vision inspection step S170 for visually inspecting the fusion state of the hub 30 and the filter 60 welded by the ultrasonic welding apparatus 140, A defective discharge step S180 for discharging the defective filter needle 70 identified through the needle inspecting step S150 and the vision inspecting step S170 and a discharging operation for discharging the completed normal filter needle 70 The ultrasonic fusing device 140 includes a body 141 and a pillar member 142 fixed to the body 141 and having rails formed on one side thereof, A fusing cylinder 143 fixed to the upper side of the pillar member 142 and connected to the end of the piston rod of the fusing cylinder 143 to move up and down in a vertical direction, The ultrasonic welder 145 fixed to the slider 144 and the hub 30 transported in the filter insert step S130 to the ultrasonic welder 145 A position adjusting unit (1) for positioning the welding rod (145a) 46) is provided.본 발명은 주사기용 필터니들 제조방법이 개시된다. 본 발명의 일 실시예에 따른 주사기용 필터니들 제조방법은 허브에 필터가 결합되지 않은 벌크니들(50)을 공급할 수 있도록 한 벌크니들 공급단계(S110)와, 보호캡 분리장치(120)를 이용하여 상기 벌크니들 공급단계(S110)에서 공급
