The present invention relates to a non-magnetic cast iron which minimizes the content of nickel (Ni) in alloying design by adjusting the content of each element so as to realize non-magnetic property and economic efficiency. As such,;3.0 to 3.7 wt% C, 2.0 to 2.5 wt% Si, 5.0 to 5.5 wt% Mn, 1.5 to 2.5 wt% Cr, 9.5 to 10.5 wt% Ni, 3.0 to 4.0 wt% Cu, And 76% by weight of Fe as an alloy design.;Other embodiments may include 3.0 to 3.7 wt% C, 2.0 to 2.5 wt% Si, 5.0 to 5.5 wt% Mn, 1.5 to 2.5 wt% Cr, 7.5 to 8.5 wt% Ni, 3.0 to 4.0 wt% Cu , And 71.3 to 76 wt% of Fe may be alloyed.
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