In an aseptic filling apparatus, a CIP of the content filling station is performed after rotation of a wheel in the content filling station is stopped, a COP or SOP of the content filling station is performed while the wheel in the content filling station is rotating immediately after the CIP is completed, an SIP of the content filling station is performed with rotation of the wheel in the content filling station being stopped immediately after the COP or SOP is completed, and one or both of the COP and SOP of the other stations is performed in a predetermined order while wheels in the other stations are rotating in a period from the start of the CIP to the end of the SIP.
