To provide an adhesive strength measuring apparatus in which measurement precision can be improved, and an adhesive strength measuring method.

An adhesive strength measuring apparatus 1 which measures an adhesive strength of an adhesion member W adhered to an adhered surface T1 of an adhered body T comprises pressing means which presses a corner portion W1 of the adhesion member W in a direction parallel to the adhered surface T1 and toward a proximal end side of the corner portion W1, load measuring means which measures a load caused by pressing, and adhesive strength output means which outputs a maximum load measured by the load measuring means.