Provided is an adhesion preventing medical material including a bioresorbable base material and a polyhydric alcohol or aqueous polyhydric alcohol solution, which contains the polyhydric alcohol, held in the bioresorbable base material. The bioresorbable base material includes a bioresorbable material, and has a swelling degree of 200 to 3,000 mass% and a water elution rate of not higher than 10 mass%. After immersed for 3 hours in water of 25°C in an amount at least 50 times a total mass of the aqueous polyhydric alcohol solution or aqueous polyhydric alcohol solution and the bioresorbable base material, the polyhydric alcohol remains in an amount of not greater than 30 mass% of that of the polyhydric alcohol before the immersion.
