An incubator (1) has an incubation chamber (2) and a shaking device (4) to shake receptacles (5) placed in the incubation chamber (2). A device chamber (3) adjoins the incubation chamber (2) and accommodates at least parts of the shaking device (4). The shaking device (4) has a base plate (8) that seals off the incubation chamber (2) from the device chamber 3. A shaking table (11) is on the inner face (9) of the base plate (8) and can be moved in a horizontal plane by a drive arm (10). A motor (34) is arranged on the outer face (37) of the base plate (8). The motor (34) drives a drive shaft (14) that is rotatably mounted in the base plate (8) and that is operatively connected to the drive arm (10).