<p>A thermal line printer usable as a small output terminal. A printer body has a platen roller rotatably supported by a casing (1) having side plates (2a,2b) on either side thereof. A line-printing type thermal head (5) is swingably supported by the printer body while being resiliently urged toward the platen roller. This arrangement allows the thermal head (5) to be easily mounted on and dismounted from the printer body. <IMAGE></p>
