Multi-needle assembly for suction injector

A multi-needle assembly for cosmetic procedure, comprising:

• a main body having an inner space extending from one end to another end of the main body;
• a reciprocating member provided in the main body to be moved along an inner circumferential surface of the main body in a forward and backward direction;
• a needle member placed into the reciprocating member and coupled to the reciprocating member, and having a plurality of needles that enter or exit through the one end of the main body;
• a guide suction into or from which the plurality of needles enter or exit, wherein the guide suction comprises an opening to be brought into contact with a skin and forms a suction force for sucking in foreign matter from inside the skin while the opening is in close contact with the skin;
• length adjusting grooves for moving the reciprocating member in flail the forward and backward direction, the length adjusting grooves including at least one spiral groove and flail at least one slide groove formed in the inner circumferential surface of the main body to adjust a projecting length of the needles;
• and
• a protrusion formed on an outer circumferential surface of the reciprocating member for moving the reciprocating member in the forward and backward direction along the at least one spiral groove and the at least one slide groove to adjust a projecting length of the needles.