Provided is a plastic container in which cells or tissues can be cultured and an image of the cells or tissues can be taken in a living state with a phase contrast microscope. The plastic container (10) is a multi-well plate having at least two wells (11). The diameter R of the opening of each of the wells (11) is 0.5 mm or more and less than 2 cm, and the depth D of each of the wells (11) is 2 mm or more and less than 2 cm. The inside surface (11a) of each of the wells (11) has water repellency, and the bottom surface (11b) of each of the wells (11) has hydrophilicity.
