A cloth spreading device comprising: a plurality of input units for inputting of a cloth by a worker; a plurality of relay units provided corresponding to each of the input units; and an extension unit that spreads the cloth, wherein each of the input units comprises: an input chuck that grips the cloth; and an up-down moving machine that moves the input chuck up and down, the extension unit comprises: extension chucks in a pair that grip corner portions at opposite ends of one side of the cloth; and a transversely moving machine that moves the extension chucks in a pair transversely behind the relay units, each of the relay units receives the cloth from the input chuck having moved up to a transfer position and transfers the received cloth to the extension unit, and the input chuck having transferred the cloth to the relay unit moves down to an input position, wherein each of the relay units comprises: a relay chuck provided behind the input chuck having moved up to the transfer position; and a driver that moves the relay chuck between a forward position for transfer of the cloth from the input chuck and a backward position for transfer of the cloth to the extension chucks, characterized in that the driver of the relay unit comprises: a circling member with a tip portion to which the relay chuck is attached; and an actuator that causes the circling member to circle. a plurality of input units for inputting of a cloth by a worker; a plurality of relay units provided corresponding to each of the input units; and an extension unit that spreads the cloth, wherein each of the input units comprises: an input chuck that grips the cloth; and an up-down moving machine that moves the input chuck up and down, the extension unit comprises: extension chucks in a pair that grip corner portions at opposite ends of one side of the cloth; and a transversely moving machine that moves the extension chucks in a pair transversely behind the relay units, each of the relay units receives the cloth from the input chuck having moved up to a transfer position and transfers the received cloth to the extension unit, and the input chuck having transferred the cloth to the relay unit moves down to an input position, wherein each of the relay units comprises: a relay chuck provided behind the input chuck having moved up to the transfer position; and a driver that moves the relay chuck between a forward position for transfer of the cloth from the input chuck and a backward position for transfer of the cloth to the extension chucks, an input chuck that grips the cloth; and an up-down moving machine that moves the input chuck up and down, the extension unit comprises: extension chucks in a pair that grip corner portions at opposite ends of one side of the cloth; and a transversely moving machine that moves the extension chucks in a pair transversely behind the relay units, each of the relay units receives the cloth from the input chuck having moved up to a transfer position and transfers the received cloth to the extension unit, and the input chuck having transferred the cloth to the relay unit moves down to an input position, wherein each of the relay units comprises: a relay chuck provided behind the input chuck having moved up to the transfer position; and a driver that moves the relay chuck between a forward position for transfer of the cloth from the input chuck and a backward position for transfer of the cloth to the extension chucks, extension chucks in a pair that grip corner portions at opposite ends of one side of the cloth; and a transversely moving machine that moves the extension chucks in a pair transversely behind the relay units, each of the relay units receives the cloth from the input chuck having moved up to a transfer position and transfers the received cloth to the extension unit, and the input chuck having transferred the cloth to the relay unit moves down to an input position, wherein each of the relay units comprises: a relay chuck provided behind the input chuck having moved up to the transfer position; and a driver that moves the relay chuck between a forward position for transfer of the cloth from the input chuck and a backward position for transfer of the cloth to the extension chucks, a relay chuck provided behind the input chuck having moved up to the transfer position; and a driver that moves the relay chuck between a forward position for transfer of the cloth from the input chuck and a backward position for transfer of the cloth to the extension chucks, a circling member with a tip portion to which the relay chuck is attached; and an actuator that causes the circling member to circle.