A manufacturing method of a liquid containing container for manufacturing a liquid containing container by using a mold (3, 3') for liquid blow molding, an intermediate conveying device, a rotary conveying machine (6, 6") and a rotary capper (7, 7"), the capper (7, 7") having a plurality of container holding portions (7a, 7a") configured to be displaced at a constant first velocity (V1, V1") in a circumferential direction of a first central axis (7b, 7b") and provided at a constant first pitch (P1, P1") in the circumferential direction of the first central axis (7b, 7b"), and the rotary conveying machine (6, 6") having a plurality of carriers (6a, 6a") configured to be displaced at a second velocity (V2, V2") in a circumferential direction of a second central axis (6b, 6b") and provided at a second pitch (P2, P2") in the circumferential direction of the second central axis (6b, 6b"); the method comprising: a liquid blow molding step of supplying a pressurized liquid into a plurality of preforms disposed in a plurality of cavities (4, 4') of the mold (3, 3') to mold the plurality of preforms into a plurality of container bodies having a barrel containing the liquid; an intermediate conveying step of, after the mold (3, 3') is opened, gradually accelerating the plurality of container bodies to a third velocity (V3, V3") and delivering the plurality of container bodies to the plurality of carriers (6a, 6a") of the rotary conveying machine (6, 6") by the intermediate conveying device; a rotary conveying step of conveying the plurality of container bodies and sequentially delivering the plurality of container bodies to the plurality of container holding portions (7a, 7a") of the capper (7, 7") by the plurality of carriers (6a, 6a") of the rotary conveying machine (6, 6"); and a capping step of attaching a cap to a mouth continuous with the barrel of the plurality of container bodies while the plurality of container bodies is conveyed by the plurality of container holding portions (7a, 7a") of the capper (7, 7"), wherein the rotary conveying machine (6, 6") includes: a rotary table configured to hold the carriers (6a, 6a") and rotate at a constant angular velocity (ω2a) in the circumferential direction of the second central axis (6b, 6b"); and a carrier drive device configured to allow the carriers (6a, 6a") to be displaced forward/backward, respectively, relative to the rotary table in the circumferential direction of the second central axis (6b, 6b"). a liquid blow molding step of supplying a pressurized liquid into a plurality of preforms disposed in a plurality of cavities (4, 4') of the mold (3, 3') to mold the plurality of preforms into a plurality of container bodies having a barrel containing the liquid; an intermediate conveying step of, after the mold (3, 3') is opened, gradually accelerating the plurality of container bodies to a third velocity (V3, V3") and delivering the plurality of container bodies to the plurality of carriers (6a, 6a") of the rotary conveying machine (6, 6") by the intermediate conveying device; a rotary conveying step of conveying the plurality of container bodies and sequentially delivering the plurality of container bodies to the plurality of container holding portions (7a, 7a") of the capper (7, 7") by the plurality of carriers (6a, 6a") of the rotary conveying machine (6, 6"); and a capping step of attaching a cap to a mouth continuous with the barrel of the plurality of container bodies while the plurality of container bodies is conveyed by the plurality of container holding portions (7a, 7a") of the capper (7, 7"), wherein the rotary conveying machine (6, 6") includes: a rotary table configured to hold the carriers (6a, 6a") and rotate at a constant angular velocity (ω2a) in the circumferential direction of the second central axis (6b, 6b"); and a carrier drive device configured to allow the carriers (6a, 6a") to be displaced forward/backward, respectively, relative to the rotary table in the circumferential direction of the second central axis (6b, 6b"). a rotary table configured to hold the carriers (6a, 6a") and rotate at a constant angular velocity (ω2a) in the circumferential direction of the second central axis (6b, 6b"); and a carrier drive device configured to allow the carriers (6a, 6a") to be displaced forward/backward, respectively, relative to the rotary table in the circumferential direction of the second central axis (6b, 6b").