[Problem] To provide a support that increases the abdominal pressure of the user, can prevent retroflexion, and can stabilize the sacroiliac joint. [Solution] A support (100) is equipped with: a main body (10) having a back-contact portion (11) loops (21) arranged on the front surface of both ends of the main body (10) a first auxiliary band portion (31) having one end (31a) thereof fixed to the top end of the left side (11c) of the back-contact portion (11), and the other end (31b) thereof fixed to the bottom end of the right side (11d) of the back-contact portion (11) a second auxiliary band portion (32) forming a pair with the first auxiliary band portion (31) a first link portion (41) slidably arranged between the one end (31a) and the other end (31b) of the first auxiliary band portion (31) a second link portion (42) forming a pair with the first link portion (41) a first adjustment band portion (51) having one end (51a) thereof fixed to the loop (21) on the right end (10b) side of the main body (10), and the other end (51b) thereof capable of fastening to the loop (21) on the right end (10b) side of the main body (10) and a second adjustment band portion (52) forming a pair with the first adjustment band portion (51).
