Abstract: A massage structure to be mounted onto a back portion of a backpack includes a base and a plurality of protrusions. The plurality of protrusions are distributed in a predetermined discrete manner over the base and arranged to align with at least one specific acupoint on a back of a user. Each of the protrusions protrudes outwards away the back portion from the base with a predetermined height for applying massage onto the back of the user carrying the backpack. The massage structure further includes a pair of extended bases upward extended from a top end of each base to the straps of the backpack respectively, and a plurality of extended protrusions formed on the extended bases and arranged to align with at least one specific shoulder acupoint on a shoulder of the user.