A roll press apparatus (100;200;300;400;500) configured to form a compressed strip-shaped electrode plate formed with a compressed active material layer (5,6), which is formed in a manner that a strip-shaped electrode plate is conveyed in a longitudinal direction to be roll-pressed so that an active material layer (5Z,6Z) is compressed, the strip-shaped electrode plate comprising: an active material portion including a strip-shaped current colleting foil and the active material layer (5Z,6Z) of a strip shape extending over the current collecting foil in the longitudinal direction of the current collecting foil, the active material portion of a strip shape extending in the longitudinal direction and including the active material layer (5Z,6Z) in a thickness direction of the current collecting foil, and an active material absent portion of a strip shape extending in the longitudinal direction and being arranged with the active material portion in a width direction of the current collecting foil, the active material absent portion having no active material layer (5Z,6Z) in the thickness direction and having a thinner thickness than the active material portion, wherein the roll press apparatus (100;200;300;400;500) includes: a pair of press rolls placed in parallel with a roll gap formed therebetween; and characterized in that the roll press apparatus includes a tensile-force-ratio adjustment mechanism (140;240;340;440;540) configured to adjust a tensile force ratio (τd / τu) of an upstream active material absent portion tensile force (τu) and a downstream active material absent portion tensile force (τd) to be smaller than in a case of not providing the tensile-force-ratio adjustment mechanism, in an inter-roll active material absent portion held with no compression by the pair of press rolls (110,120) of the active material absent portion of the strip-shaped electrode plate. the strip-shaped electrode plate comprising: an active material portion including a strip-shaped current colleting foil and the active material layer (5Z,6Z) of a strip shape extending over the current collecting foil in the longitudinal direction of the current collecting foil, the active material portion of a strip shape extending in the longitudinal direction and including the active material layer (5Z,6Z) in a thickness direction of the current collecting foil, and an active material absent portion of a strip shape extending in the longitudinal direction and being arranged with the active material portion in a width direction of the current collecting foil, the active material absent portion having no active material layer (5Z,6Z) in the thickness direction and having a thinner thickness than the active material portion, wherein an active material portion including a strip-shaped current colleting foil and the active material layer (5Z,6Z) of a strip shape extending over the current collecting foil in the longitudinal direction of the current collecting foil, the active material portion of a strip shape extending in the longitudinal direction and including the active material layer (5Z,6Z) in a thickness direction of the current collecting foil, and an active material absent portion of a strip shape extending in the longitudinal direction and being arranged with the active material portion in a width direction of the current collecting foil, the active material absent portion having no active material layer (5Z,6Z) in the thickness direction and having a thinner thickness than the active material portion, wherein the roll press apparatus (100;200;300;400;500) includes: a pair of press rolls placed in parallel with a roll gap formed therebetween; and characterized in that the roll press apparatus includes a tensile-force-ratio adjustment mechanism (140;240;340;440;540) configured to adjust a tensile force ratio (τd / τu) of an upstream active material absent portion tensile force (τu) and a downstream active material absent portion tensile force (τd) to be smaller than in a case of not providing the tensile-force-ratio adjustment mechanism, in an inter-roll active material absent portion held with no compression by the pair of press rolls (110,120) of the active material absent portion of the strip-shaped electrode plate. a pair of press rolls placed in parallel with a roll gap formed therebetween; and characterized in that the roll press apparatus includes a tensile-force-ratio adjustment mechanism (140;240;340;440;540) configured to adjust a tensile force ratio (τd / τu) of an upstream active material absent portion tensile force (τu) and a downstream active material absent portion tensile force (τd) to be smaller than in a case of not providing the tensile-force-ratio adjustment mechanism, in an inter-roll active material absent portion held with no compression by the pair of press rolls (110,120) of the active material absent portion of the strip-shaped electrode plate.