THERMAL TRANSFER SHEET

There is provided a thermal transfer sheet by means of which a transfer layer can be accurately removed without being influenced by the conditions under which the transfer layer of the intermediate transfer medium is removed by means of a peel-off layer. In a thermal transfer sheet (10) having a peel-off layer (4) to remove a transfer layer (31) of an intermediate transfer medium (30), the above problem is solved by the thermal transfer sheet (10), wherein a primer layer (2) and the peel-off layer (4) are provided in this order on a substrate (1) and the primer layer (2) contains at least one of: alumina particles derived from sol-based inorganic particles having a primary particle size of 200 nm or less, a polyvinyl pyrrolidone type resin having a glass-transition temperature (Tg) of 150?C or more, a polyester type resin having a glass-transition temperature (Tg) of 100?C or more, and a resin formed by curing a polyvinyl alcohol type resin.