A vertical pneumatic fender comprising a cylindrical body portion; and hemispherical portions at both ends of the cylindrical body portion, a bob being connected to the lower hemispherical portion of the hemispherical portions; and ballast water being contained within an internal space of the fender; the cylindrical body portion being constituted by an inner rubber layer and an outer rubber layer, characterized in that: the cylindrical body portion is further being constituted by a plurality of reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) layered between the inner rubber layer and the outer rubber layer, the reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) being cord layers formed from a multiplicity of cords (6a, 6b, 6c, 6d) arranged in parallel, cords (6a, 6b, 6c, 6d) in adjacently layered outer and inner reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) being disposed so as to intersect one another at a predetermined cord angle with respect to a cylinder axial direction of the cylindrical body portion, wherein intermediate rubber layers (8a, 8b, 8c, 8d, 8e, 8f) are interposed between the reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f), the cord angle is set from 15° to 45°, both 15° and 45° inclusive, in a neutral state, and an air injection device for injecting additional air is connected to the internal space of the fender. a cylindrical body portion; and hemispherical portions at both ends of the cylindrical body portion, a bob being connected to the lower hemispherical portion of the hemispherical portions; and ballast water being contained within an internal space of the fender; the cylindrical body portion being constituted by an inner rubber layer and an outer rubber layer, characterized in that: the cylindrical body portion is further being constituted by a plurality of reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) layered between the inner rubber layer and the outer rubber layer, the reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) being cord layers formed from a multiplicity of cords (6a, 6b, 6c, 6d) arranged in parallel, cords (6a, 6b, 6c, 6d) in adjacently layered outer and inner reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) being disposed so as to intersect one another at a predetermined cord angle with respect to a cylinder axial direction of the cylindrical body portion, wherein intermediate rubber layers (8a, 8b, 8c, 8d, 8e, 8f) are interposed between the reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f), the cord angle is set from 15° to 45°, both 15° and 45° inclusive, in a neutral state, and an air injection device for injecting additional air is connected to the internal space of the fender. the cylindrical body portion is further being constituted by a plurality of reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) layered between the inner rubber layer and the outer rubber layer, the reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) being cord layers formed from a multiplicity of cords (6a, 6b, 6c, 6d) arranged in parallel, cords (6a, 6b, 6c, 6d) in adjacently layered outer and inner reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f) being disposed so as to intersect one another at a predetermined cord angle with respect to a cylinder axial direction of the cylindrical body portion, wherein intermediate rubber layers (8a, 8b, 8c, 8d, 8e, 8f) are interposed between the reinforcing layers (5a, 5b, 5c, 5d, 5e, 5f), the cord angle is set from 15° to 45°, both 15° and 45° inclusive, in a neutral state, and an air injection device for injecting additional air is connected to the internal space of the fender.