A stirring apparatus includes a bed, a column, a revolution shaft, a revolution driving device, a support member, and a stirring unit. The revolution shaft is supported by the column and extends in a horizontal direction. The revolution driving device rotates the revolution shaft about a first center line being an axis of the revolution shaft. The support member is fixed to the revolution shaft. The stirring unit includes cups and a self-rotation mechanism. The cups are disposed on a circumference centered on the first center line via the support member. The self-rotation mechanism rotates the cups about a second center line passing through a center of the cups. The cups is provided in an inclined manner so that a perpendicular from the center of a bottom plate to the first center line is shorter than a perpendicular from the center of an opening to the first center line.