A warp tension adjusting device of a tire chord weaving apparatus for weaving a tire chord fabric including a tire fabric section and a tabby section, the tire chord weaving apparatus including a creel device that supplies multiple warp yarns, the warp tension adjusting device including a dancer roller (10a, 10b) for equalizing tensions of the warp yarns drawn from the creel device and a dropper device for detecting warp breakage, the dropper device being disposed upstream of the dancer roller (10a, 10b) in a direction in which the warp yarns are fed, and a loom that weaves the tire chord fabric from the warp yarns supplied via the warp tension adjusting device, the warp tension adjusting device comprising: an urging roller that is disposed above the warp yarns arranged in a sheet-like shape, that extends in a direction perpendicular to the direction in which the warp yarns are fed, and that is movable in an up-and-down direction; and an urging device that is connected to the urging roller and that includes a fluid-pressure cylinder for applying an urging force to the urging roller in such a direction that the urging roller is lowered; and a link mechanism that is connected to the urging roller and to the fluid-pressure cylinder and that applies a force that is generated by fluid pressure acting on the fluid-pressure cylinder to the urging roller as the urging force, characterised by the link mechanism including a pair of first levers and a pair of second levers, one end of each of the pair of first levers being connected to a corresponding one of ends of the urging roller so as to be relatively rotatable, one end of each of the pair of second levers being supported by a corresponding one of a pair of frames so as to be rotatable via a second shaft that is supported by the pair of frames, the other end of each of the pair of second levers being connected to the other end of a corresponding one of the first levers so as to be relatively rotatable via a first shaft having an axial center that is not located on a straight line connecting an axial center of the second shaft to an axial center of the urging roller, wherein the urging device is configured so that the fluid-pressure cylinder performs an operation of applying a force to the second lever for rotating the second lever around an axis of the second shaft, and wherein the urging force is applied to the urging roller via the first lever when the second lever is rotated around the axis due to the operation of the fluid-pressure cylinder. an urging roller that is disposed above the warp yarns arranged in a sheet-like shape, that extends in a direction perpendicular to the direction in which the warp yarns are fed, and that is movable in an up-and-down direction; and an urging device that is connected to the urging roller and that includes a fluid-pressure cylinder for applying an urging force to the urging roller in such a direction that the urging roller is lowered; and a link mechanism that is connected to the urging roller and to the fluid-pressure cylinder and that applies a force that is generated by fluid pressure acting on the fluid-pressure cylinder to the urging roller as the urging force, characterised by the link mechanism including a pair of first levers and a pair of second levers, one end of each of the pair of first levers being connected to a corresponding one of ends of the urging roller so as to be relatively rotatable, one end of each of the pair of second levers being supported by a corresponding one of a pair of frames so as to be rotatable via a second shaft that is supported by the pair of frames, the other end of each of the pair of second levers being connected to the other end of a corresponding one of the first levers so as to be relatively rotatable via a first shaft having an axial center that is not located on a straight line connecting an axial center of the second shaft to an axial center of the urging roller, wherein the urging device is configured so that the fluid-pressure cylinder performs an operation of applying a force to the second lever for rotating the second lever around an axis of the second shaft, and wherein the urging force is applied to the urging roller via the first lever when the second lever is rotated around the axis due to the operation of the fluid-pressure cylinder.