The present invention relates to a nose hair trimmer having an antibacterial function and, more particularly, to a nose hair trimmer having an antibacterial function, wherein contamination of the inside/outside of the trimmer body by various kinds of microorganisms is prevented such that parts that contact nose hair when the nose hair is trimmed can remain clean, thereby establishing and maintaining more sanitary environments. The present invention comprises: a case (10) in which a battery (13) and a motor (15) are contained, the case (10) comprising lower and upper cases (11, 12) which are separately formed, and which can be coupled to each other; an inner rotating blade unit (40) removably fitted to a rotating shaft (16) of the motor (15); an outer fixed blade holder (20) installed to cover the upper part of the case (10) such that the inner rotating blade unit (40) is accommodated therein; a dome-shaped outer fixed blade (30) installed on the upper part of the outer fixed blade holder (20) in a dome shape, the dome-shaped outer fixed blade (30) having a through-hole (31) formed such that nose hair can enter therethrough; and a cap (50) installed to cover the outer fixed blade holder (20). An antibacterial mesh (21) is interposed between the inner top surface of the outer fixed blade (30) and the upper portion of the inner rotating blade unit (40). The antibacterial mesh (21) is obtained by coating the entire mesh made of a copper yarn which has a diameter of 0.05m or has a thickness of 0.5m, and which has a purity of 99.99%, with an antibacterial solvent comprising 0.5-5wt% of titanium dioxide, 1-10wt% of silicon dioxide, 0.2-3wt% of nickel, 30-80wt% of ethanol, and 5-30wt% of water.