A Gnetum extract having antibacterial activity and antioxidant activity (radical scavenging activity), obtained from Gnetum fruit or Gnetum seed without the need to conduct any special operation. This Gnetum extract exerts various physiological (pharmacological) activities and hence can be used as an active ingredient of food, aliment (nutritional supplement), medicine, cosmetic, etc. The Gnetum extract can be obtained by immersing slices or triturates of Gnetum fruit or Gnetum seed in water or a water-containing organic solvent and performing ripening thereof.