The present invention relates to a deck fastening structure. The deck fastening structure according to the present invention includes an arm clip 20 fixed to each tube 13 and a male clip 40 fixed to the unit panel 30 and fastened to the arm clip 20, The clip 20 is provided with a fastening holder 23 having a fastening hole 25 formed therein and the fastening hole 25 is formed in the fastening hole 23 of the fastener holder 23, And a fastening piece 42 is provided. According to the present invention, there is an advantage in that deck construction and repair are easily performed.
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