A belt for transmitting high load, the belt comprising: two endless tension bands extending in pairs parallel to each other in a belt length direction, and each including a cord buried therein, the cord extending in a spiral having pitches in a belt width direction; and a plurality of blocks arranged along the two tension bands and each having fitting sections, the fitting sections each opening on a corresponding one of both block side faces of each of the blocks, wherein one of the two tension bands is fitted into corresponding ones of the fitting sections which open on the block side faces located on a side, the other of the two tension bands is fitted into corresponding ones of the fitting sections which open on the block side faces located on the other side, in each of the blocks, a portion of each block side face located on and above the corresponding fitting section serves as an upper pulley-contact face whereas a portion of each block side face located on and below the corresponding fitting section serves as a lower pulley-contact face, and characterised in that on each block side face of the blocks, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of the corresponding tension band to an upper end of the upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm. two endless tension bands extending in pairs parallel to each other in a belt length direction, and each including a cord buried therein, the cord extending in a spiral having pitches in a belt width direction; and a plurality of blocks arranged along the two tension bands and each having fitting sections, the fitting sections each opening on a corresponding one of both block side faces of each of the blocks, wherein one of the two tension bands is fitted into corresponding ones of the fitting sections which open on the block side faces located on a side, the other of the two tension bands is fitted into corresponding ones of the fitting sections which open on the block side faces located on the other side, in each of the blocks, a portion of each block side face located on and above the corresponding fitting section serves as an upper pulley-contact face whereas a portion of each block side face located on and below the corresponding fitting section serves as a lower pulley-contact face, and characterised in that on each block side face of the blocks, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of the corresponding tension band to an upper end of the upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.