PURPOSE: To provide a dynamometer link reduced in size and increased in precision.

CONSTITUTION: A dynamometer link comprises the first transmission member, the second transmission member which slides in axis direction against the first transmission member and a spring means which is assigned between the first and second transmission members. The relative movement of two members is amplified by a lever which is hinged with one of two members and where the other member acts. The lever comprises a radius direction arm which is connected to at least one member and which, with an interval from the connection means, consists of axis direction coupling in 2 directions against the other member, and an axis direction arm wherein a free end is provided on each size where two detection members are assigned. The link can decide direction of the force transmitted by the link.