A bone plate comprising: a band-shaped body section that is fixable, along a longitudinal direction of a tibia (X), to an obliquely anterior inner side surface of the tibia (X) at a position lower than a notch formed in an inner side surface of the tibia (X); a transverse section that is fixable, along a direction intersecting the longitudinal direction of the tibia (X), to the inner side surface of the tibia (X) at a position higher than the notch; a joining section for joining the body section and the transverse section ; and a plurality of screw holes that are arranged in the transverse section , the body section , and the joining section in a manner spaced apart from one another and that pass therethrough in a plate thickness direction, wherein the plurality of screw holes include a first screw hole provided in the joining section and a second screw hole provided in the body section the body section , the joining section , and the transverse section are continuously curved so as to be twisted about an axial line along the longitudinal direction, a first plane (α) on which an axial line of the first screw hole is disposed and a second plane (β) on which an axial line of the second screw hole is disposed are substantially parallel to each other, angles between a straight line (L) connecting a longitudinal-direction upper-end portion and lower-end portion in the bone plate and the first plane (α) and the second plane (β) are 80° to 95° inclusive, and an angle between a fourth plane (δ) including a straight line specifying an arrangement direction of a plurality of fourth screw holes and the straight line (L) connecting the longitudinal-direction upper-end portion and lower-end portion in the bone plate is 74° to 80° inclusive, and the axial line of the first screw hole and the axial line of the second screw hole are disposed at twisted positions. a band-shaped body section that is fixable, along a longitudinal direction of a tibia (X), to an obliquely anterior inner side surface of the tibia (X) at a position lower than a notch formed in an inner side surface of the tibia (X); a transverse section that is fixable, along a direction intersecting the longitudinal direction of the tibia (X), to the inner side surface of the tibia (X) at a position higher than the notch; a joining section for joining the body section and the transverse section ; and a plurality of screw holes that are arranged in the transverse section , the body section , and the joining section in a manner spaced apart from one another and that pass therethrough in a plate thickness direction, wherein the plurality of screw holes include a first screw hole provided in the joining section and a second screw hole provided in the body section the body section , the joining section , and the transverse section are continuously curved so as to be twisted about an axial line along the longitudinal direction, a first plane (α) on which an axial line of the first screw hole is disposed and a second plane (β) on which an axial line of the second screw hole is disposed are substantially parallel to each other, angles between a straight line (L) connecting a longitudinal-direction upper-end portion and lower-end portion in the bone plate and the first plane (α) and the second plane (β) are 80° to 95° inclusive, and an angle between a fourth plane (δ) including a straight line specifying an arrangement direction of a plurality of fourth screw holes and the straight line (L) connecting the longitudinal-direction upper-end portion and lower-end portion in the bone plate is 74° to 80° inclusive, and the axial line of the first screw hole and the axial line of the second screw hole are disposed at twisted positions. <EOS>