The present invention relates to adhesion control of a hydrogel. Even if a metal cation having weak interaction with a low-molecular-weight polymer or an anionic polymer is used, the hydrogel enables stable interaction thereof. The hydrogel achieves high mechanical strength and excellent elasticity through enhanced physical cross-linking, thereby enabling low adhesion to be maintained even if being continuously and repeatedly stretched and contracted, and has excellent compatibility with a particulate material such as sand and the like, thereby having unique tactile properties while maintaining a constant exterior, and thus can be utilized as a material suitable for various industrial applications such as medical uses, environmental purification, biomaterials and the like.
