A baby carrier includes a carrying assembly and a support sheet. The carrying assembly includes a waist member and two shoulder straps. A front end of the waist member is connected with a lower portion of the support sheet. An upper portion of a front end of each shoulder strap is connected with an upper portion of the support sheet. A rear end of each shoulder strap is connected with a middle portion of the support sheet. A lower portion of a front end of each shoulder strap forms a circular structure connected with the waist member. A fixing member is disposed on the front end of the waist member. The lower portion of the front end of each shoulder strap is slidably connected with the fixing member. A width between the two shoulder straps is adjusted by a slide of each shoulder strap on the fixing member.