Abstract: A hemostatic material includes a lipid that can accelerate adhesion or aggregation of platelets even if the lipid does not carry a protein or a peptide involved in adhesion or aggregation of platelets such as GPIb and H12 and, to achieve the object, provides a hemostatic material including a water-insoluble base and a lipid supported on a surface of the base, wherein the lipid includes one or two or more anionic lipids.

Abstract: A carboxylic acid-type lipid can accelerate adhesion or aggregation of platelets even if the carboxylic acid-type lipid does not carry a protein involved in adhesion or aggregation of platelets or a peptide corresponding to an active site of the protein; a lipid particle and a lipid membrane each include the carboxylic acid-type lipid; and a platelet aggregation accelerating agent, a platelet adhesion accelerating agent, a hemostatic agent and a platelet substitute each include the carboxylic acid-type lipid, the lipid particle or the lipid membrane. A carboxylic acid-type lipid is selected from carboxylic acid-type lipids represented by formulas (I) to (VI), a lipid particle includes the carboxylic acid-type lipid, a lipid membrane includes the carboxylic acid-type lipid, and a platelet aggregation accelerating agent, a platelet adhesion accelerating agent, a hemostatic agent and a platelet substitute each include the carboxylic acid-type lipid, the lipid particle or the lipid membrane.