Disclosed is a non-slip footwear which comprises a main body formed of a flexible material and formed to surround the sole of a foot of a user and to open the top side of the foot; toe insertion holes formed of the flexible material, protruding from the front part of the main body so that toes of the foot are respectively inserted into the toe insertion holes; an non-slip outsole formed at the heel part of the main body and formed of foamed rubber having abrasion resistance, and having a thickness of 1 mm˜5 mm; and non-slip dots formed at the sole part of the main body and the non-slip outsole.