The present invention provides a device for producing a large number of uniform spheroids by an easy method. The spheroid-producing device (1) at least includes a first surface (11), a second surface (12), and a plurality of wall surfaces (13). The second surface (12) faces the first surface (11). The respective wall surfaces (13) constitute a plurality of holes penetrating through the first surface and the second surface. In addition, an equivalent diameter of inscribed circles of openings in the first surface (11) is greater than an equivalent diameter of inscribed circles of openings in the second surface (12).