PURPOSE: To prevent generation of air bubbles, wrinkles, etc., in a guide member which comes into contact with a heat developable photosensitive material to be heated.

CONSTITUTION: A turn guide 61 for pressing the photosensitive material to a heat roller is inserted into and covered by a guide surface material 68 obtd. by forming an elastically deformable supporting member 66 into a cylindrical shape. The supporting member and the guide surface material are fixed to a bracket 64 by means of a retaining fitting 80. The guide surface material is detained only at the end on the transporting direction (arrow C direction) side of the photosensitive material to the supporting member. The turn guide is so formed as to press the photosensitive material in contact with the guide surface material to the heat roller by energizing force of the supporting member and does not generate ruggedness by the air bubbles and wrinkles. The ruggedness, if generated on the guide surface member, is easily dissipated and the uniform and tight contact of the photosensitive material with the heat roller is possible.