The present invention provides a cosmetic brush and a manufacturing method thereof. The cosmetic brush is characterized in that the cosmetic brush includes a brush hair part provided with brush hairs and a brush coupler attached to the brush hairs; a brush body that support an end of the brush coupler; a coupling member that has a first part coupled to the brush body and a second part coupled to the edge of the brush coupler and has a metallic tube; and a fixing member that prevents shaking of the brush coupler between the brush body and the brush coupler, in which the coupling member and the brush body are combined by pressing the portion of the coupling member where the coupling member and the brush body are in contact with each other.