The present invention relates to a diamond type cam for rock climbing, and according to the present invention, the diamond type cam for rock climbing comprises: a body having an operating member formed therein; a slide member slidably coupled to the body; a plurality of extension cams, ends of which are rotatably coupled to the body and the slide member, respectively, the respective extending ends being rotatably hinge-coupled; and a plurality of wires, ends of which are coupled to a predetermined lower location of the extending cam, and the other ends of which are rotatably coupled to a predetermined location of the slide member.
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