PROBLEM TO BE SOLVED: To provide a strain detection module and a strain sensor fixing method capable of safely, easily and securely fixing a strain sensor on the skin and capable of reusing the strain sensor.SOLUTION: A strain detection module according to the present invention includes a sheet-like strain sensor for detecting an elongation/contraction and a pair of engagement members laminated on rear surface sides of both end parts of the elongation/contraction direction thereof. The pair of these engagement members have an engagement structure attachably detachably engaged with the fixing member fixed to a measurement object on the rear surface. The engagement structure preferably includes at least one engagement element capable of engaging with a fiber sheet. The strain sensor fixing method includes: a step of forming a strain detection module by laminating a pair of hook-and-loop fastener male materials on the rear surface sides of both end parts toward the elongation/contraction direction of the sheet-like strain sensor which detects the elongation/contraction； a step of adhering a pair of adhesive bandages having a fiber sheet and an adhesive layer laminated on a rear surface of the fiber sheet to the measurement object； and a step of engaging the pair of surface fastener male materials of the strain detection module with the fiber sheets of the pair of adhesive bandages.SELECTED DRAWING: Figure 3
