A strap sticker for body adhesion is provided with an outer layer and an inner layer of different elastic coefficients, and an observation well running through both the inner layer and the outer layer, a well cross section profile of the observation well and a level for inner layer material coming out from the observation well changing with a force bearing status of a body of the strap sticker. Thereby, naked eyes may be used to identify directly a force bearing extension level of the strap sticker to meet the purpose of home use.
