A bone plate comprising: a band-shaped body section that is fixable, along a longitudinal direction of a tibia, to an obliquely anterior inner side surface of the tibia at a position lower than a notch formed in an inner side surface of the tibia; a transverse section that is fixable, along a direction intersecting the longitudinal direction of the tibia, to the inner side surface of the tibia 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 (5, 5a, 5b, 5c, 6, 7) 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 (5, 5a, 5b, 5c, 6a, 6b, 6c) 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 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 (6, 6a, 6b, 6c) and the straight line 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, to an obliquely anterior inner side surface of the tibia at a position lower than a notch formed in an inner side surface of the tibia; a transverse section that is fixable, along a direction intersecting the longitudinal direction of the tibia, to the inner side surface of the tibia 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 (5, 5a, 5b, 5c, 6, 7) 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 (5, 5a, 5b, 5c, 6a, 6b, 6c) 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 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 (6, 6a, 6b, 6c) and the straight line 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.