The present invention is intended to provide a shrimp flavor composition and a shrimp flavor enhancer with which a more desirable shrimp flavor can be obtained, and to provide a food, a drink or a seasoning that contains the composition or the enhancer. The present invention is concerned with a shrimp flavor composition and a shrimp flavor enhancer that contain at least one of 1,5-octadien-3-one and 1,5-octadien-3-ol, and a food, a drink or a seasoning that contains the composition or the enhancer.