A synthetic resin container in a bottle shape comprising a mouth as a dispensing spout for a content medium, a trunk extending contiguous to the mouth via a shoulder , and a bottom closing a lower end of the trunk , the container comprising: a parting line (PL) formed on the trunk as extending in the vertical direction; and a plurality of reduced pressure absorbing panels each formed as a groove extending in the vertical direction while twisting in the circumferential direction about the central axis of the trunk , the reduced pressure absorbing panels being disposed in the trunk as being arranged side by side in the circumferential direction, wherein: the parting line (PL) passes through an upper part of a first reduced pressure absorbing panel and through a lower part of a second reduced pressure absorbing panel , the first reduced pressure absorbing panel is shallower in depth at the upper part thereof than at a central part thereof in the vertical direction, and the second reduced pressure absorbing panel is shallower in depth at the lower part thereof than at a central part thereof in the vertical direction, characterized in that the parting line (PL) passes through a central part in the vertical direction of a third reduced pressure absorbing panel , the depth at the central part in the vertical direction of the third reduced pressure absorbing panel is shallower than the depth at the central part in the vertical direction of the first reduced pressure absorbing panel and of the second reduced pressure absorbing panel . a parting line (PL) formed on the trunk as extending in the vertical direction; and a plurality of reduced pressure absorbing panels each formed as a groove extending in the vertical direction while twisting in the circumferential direction about the central axis of the trunk , the reduced pressure absorbing panels being disposed in the trunk as being arranged side by side in the circumferential direction, wherein: the parting line (PL) passes through an upper part of a first reduced pressure absorbing panel and through a lower part of a second reduced pressure absorbing panel , the first reduced pressure absorbing panel is shallower in depth at the upper part thereof than at a central part thereof in the vertical direction, and the second reduced pressure absorbing panel is shallower in depth at the lower part thereof than at a central part thereof in the vertical direction, the parting line (PL) passes through an upper part of a first reduced pressure absorbing panel and through a lower part of a second reduced pressure absorbing panel , the first reduced pressure absorbing panel is shallower in depth at the upper part thereof than at a central part thereof in the vertical direction, and the second reduced pressure absorbing panel is shallower in depth at the lower part thereof than at a central part thereof in the vertical direction, characterized in that the parting line (PL) passes through a central part in the vertical direction of a third reduced pressure absorbing panel , the depth at the central part in the vertical direction of the third reduced pressure absorbing panel is shallower than the depth at the central part in the vertical direction of the first reduced pressure absorbing panel and of the second reduced pressure absorbing panel . <EOS>