A transfer device for an automatic transfer switch comprising: frame bases (211, 221) provided on a plurality of air circuit breakers, respectively; frame covers (212, 222) each coupled to one side surface to the corresponding frame base (211, 221); closing links (213, 223) and trip links (214, 224) rotatably coupled between each frame base (211, 221) and each frame cover (212, 222) and disposed to be rotatable in cooperation with a closing operation and a trip operation of a plurality of air circuit breakers, respectively; and transmission rods (215, 225) each having both ends coupled to the corresponding closing link (213, 223) and trip link (214, 224) to allow cooperation of the closing operation and the trip operation of the plurality of air circuit breakers, wherein the closing link (213, 223) and the trip link (214, 224) each have a central portion rotatably coupled to the frame base (211, 221) and the frame cover (212, 222), and the transmission rod (215, 225) is rotatably coupled to each one end of the closing link (213, 223) and the trip link (214, 224), characterised in that each closing link (213, 223) has another end with a coupling groove in a shape of a slot such that a closing lever for selectively rotating the closing link (213, 223) is slidably coupled thereto, and each trip link (214, 224) has another end coupled with a trip lever (112, 122), the trip lever (112, 122) operating an interlock lever for maintaining or releasing a tripped state of each air circuit breaker, and wherein each of the frame base (211, 221) and the frame cover (212, 222) comprises sliding holes (211e, 221e) in a shape of a slot to transfer a rotational force of the trip link (214, 224) to the trip lever (112, 122) in response to the coupled portion between the trip links (214, 224) and the trip lever (112, 122) being rotated based on a center of rotation of the trip links (214, 224). frame bases (211, 221) provided on a plurality of air circuit breakers, respectively; frame covers (212, 222) each coupled to one side surface to the corresponding frame base (211, 221); closing links (213, 223) and trip links (214, 224) rotatably coupled between each frame base (211, 221) and each frame cover (212, 222) and disposed to be rotatable in cooperation with a closing operation and a trip operation of a plurality of air circuit breakers, respectively; and transmission rods (215, 225) each having both ends coupled to the corresponding closing link (213, 223) and trip link (214, 224) to allow cooperation of the closing operation and the trip operation of the plurality of air circuit breakers, wherein the closing link (213, 223) and the trip link (214, 224) each have a central portion rotatably coupled to the frame base (211, 221) and the frame cover (212, 222), and the transmission rod (215, 225) is rotatably coupled to each one end of the closing link (213, 223) and the trip link (214, 224), characterised in that each closing link (213, 223) has another end with a coupling groove in a shape of a slot such that a closing lever for selectively rotating the closing link (213, 223) is slidably coupled thereto, and each trip link (214, 224) has another end coupled with a trip lever (112, 122), the trip lever (112, 122) operating an interlock lever for maintaining or releasing a tripped state of each air circuit breaker, and wherein each of the frame base (211, 221) and the frame cover (212, 222) comprises sliding holes (211e, 221e) in a shape of a slot to transfer a rotational force of the trip link (214, 224) to the trip lever (112, 122) in response to the coupled portion between the trip links (214, 224) and the trip lever (112, 122) being rotated based on a center of rotation of the trip links (214, 224).