To provide a simple structure and excellent productivity and to sufficiently reduce the pressure loss.

This web cooling roller for a printer comprises a double cylinder structure of an outer cylinder member 7 for forming the outer surface of the roller and an inner cylinder member 15 concentrically disposed within the member 7, and an annular sectional shape cooling liquid passage 19 formed between the members 7 and 15, wherein the roller is rotatably driven around the central axis of itself. A cooling liquid inlet 23 is formed at the center of the one end face of the roller and a cooling liquid outlet 25 is formed at the center of the other end face of the roller. Impellers 33, 35 are respectively disposed at the inlet chamber 27 extended between the inlet 23 and the passage 19 formed between the one end faces of the members 7, 15 and the passage 19, and the outlet chamber 29 extended between the outlet 25 and the passage 19 formed between the other end faces of the members 7, 15.