A filling system comprising: a conveyance wheel configured to convey vessels; a first filling machine (12; 32) that is provided with a plurality of filling means on a rotor; a second filling machine (14; 32) that is provided with a plurality of filling means on a rotor and arranged downstream of the conveyance wheel relative to the first filling machine (12; 32); a first inlet wheel configured to receive the vessels from the conveyance wheel and to supply the vessels to the first filling machine (12; 32); a second inlet wheel configured to receive the vessels from the conveyance wheel and to supply the vessels to the second filling machine (14; 32); a first chamber that houses the first filling machine (12; 32); a second chamber that houses the second filling machine (14; 32); a third chamber that houses the conveyance wheel; openings that are provided between the first chamber and the third chamber and between the second chamber and the third chamber and through which the vessels pass when transferred; and an opening/closing means for closing the openings; the first and second inlet wheels (12A, 14A) each comprise a holding means configured to receive the vessel from the conveyance wheel; a first outlet wheel configured to receive the vessel from the first filling machine and to hand the vessel over to the conveyance wheel; and the filling system comprises a control means that controls the reception of the holding means; and the control means is configured to switch modes between a first operation mode that conveys the vessels to the first filling machine (12; 32) and a second operation mode that conveys the vessels to the second filling machine (14; 32) instead of the first filling machine (12; 32) by controlling the reception of the vessels at the holding means, which are provided on the first and second inlet wheels (12A, 14A); characterized by a second outlet wheel configured to receive the vessel from the second filling machine and to hand the vessel over to the conveyance wheel. a conveyance wheel configured to convey vessels; a first filling machine (12; 32) that is provided with a plurality of filling means on a rotor; a second filling machine (14; 32) that is provided with a plurality of filling means on a rotor and arranged downstream of the conveyance wheel relative to the first filling machine (12; 32); a first inlet wheel configured to receive the vessels from the conveyance wheel and to supply the vessels to the first filling machine (12; 32); a second inlet wheel configured to receive the vessels from the conveyance wheel and to supply the vessels to the second filling machine (14; 32); a first chamber that houses the first filling machine (12; 32); a second chamber that houses the second filling machine (14; 32); a third chamber that houses the conveyance wheel; openings that are provided between the first chamber and the third chamber and between the second chamber and the third chamber and through which the vessels pass when transferred; and an opening/closing means for closing the openings; the first and second inlet wheels (12A, 14A) each comprise a holding means configured to receive the vessel from the conveyance wheel; a first outlet wheel configured to receive the vessel from the first filling machine and to hand the vessel over to the conveyance wheel; and the filling system comprises a control means that controls the reception of the holding means; and the control means is configured to switch modes between a first operation mode that conveys the vessels to the first filling machine (12; 32) and a second operation mode that conveys the vessels to the second filling machine (14; 32) instead of the first filling machine (12; 32) by controlling the reception of the vessels at the holding means, which are provided on the first and second inlet wheels (12A, 14A); characterized by a second outlet wheel configured to receive the vessel from the second filling machine and to hand the vessel over to the conveyance wheel.