Abstract: A liquid applicator has a vaned collector. The collector's rear end is abutted on a partition having a concave portion, creating a gap B therebetween. A cylindrical projection is formed inside the rear sleeve concentrically on its axis so that a replaceable cartridge holding ink is removably attached with its front end fitted to the cylindrical projection. A trunk core's rear end is inserted into a communication passage that is formed in the cylindrical projection with a gap A formed between the trunk core surface and the wall surface of the communication passage. This gap A is put in communication with an ink slit of the collector via gap B. Grooves are formed in the convex portion while a number of ribs are formed apart with respect to a barrel's circumference on inner peripheral surface of the communication passage of the cylindrical projection. These ribs stably support the rear end of the trunk core.