PROBLEM TO BE SOLVED: To provide a beverage in which the aggregation of collagen is controlled, viscosity is low, taste is light, and flavor is excellent, and further appearance is excellent, uniformity is maintained, and flavor and taste are excellent in the beverage containing collagen of a high density.SOLUTION: The beverage includes collagen and crystalline cellulose, and has a viscosity of at most 100 mPa s. The content of the collagen is at least 5 mass%.