Provided are a wire rod for cold heading having excellent delayed fracture resistance characteristics, parts, and a method for manufacturing same. The wire rod of the present invention comprises, by wt%, 0.3-0.5% of C, 0.01-0.3% of Si, 0.3-1.0% of Mn, 0.5-1.5% of Cr, 0.5-1.5% of Mo, 0.5-2.0% of Ni, 0.01-0.4% of V, and the remainder of Fe and other impurities, and the wire rod has a chemical composition satisfying relational expression 1, and has a microstructure comprising, by area%, 5-20% of martensite, 0.1-1% of pearlite, and the remainder of bainite.
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