Cup holder

The invention provides a cup holder which has a simple structure, can smoothly take out a beverage container from a concave part and put the beverage container into the concave part, and can stably hold a small object on a cover when the cover is closed. A cup holder (10) is provided with: a receiving part (30) for holding a beverage container such as a plastic bottle; a pair of covers (40) capable of opening and closing an upper opening of the receiving part (30); and a flexible platen member (45) attached to each of the covers (40). The platen member (45) is attached to the cover (40) by passing through and being fixed to a slit (41a) provided in the cover (40). The platen member (45) has: a widened section (45a) which protrudes toward the upper surface of the pair of covers (40) when the pair of covers (40) is closed, and which has a friction coefficient greater than that of the pair of covers (40); and a main body part (45b) which protrudes towards the beverage container when the pair of covers (40) are o