To provide a heat-developable photosensitive material free of fogging due to pressure, less liable to pinhole trouble, etc., due to adhesion of dust in electrification and easy to handle with respect to a heat-developable photosensitive material rolled up in a lightproof cassette, having high sensitivity and adaptable to rapid processing.

The heat-developable photosensitive material has a photosensitive emulsion layer comprising photosensitive silver halide, a non-photosensitive organic silver salt, a reducer capable of reducing the non-photosensitive organic silver salt and a hydrophobic binder on one face of a support and has a back coat layer on the other face of the support opposite to the photosensitive emulsion layer, the heat-developable photosensitive material has been rolled up and housed in a lightproof cassette having a slit-shaped photosensitive material drawing outlet in the width direction of the cassette and drawing load in drawing of the photosensitive material from the lightproof cassette is 0-30N.