The invention relates to a steel sheet for tool, and method for manufacturing thereof. An embodiment of the present invention is a steel sheet for a tool comprising 0.4 to 0.6 wt % of C, 0.05 to 0.5 wt % of Si, 0.1 to 1.5 wt % of Mn, 0.05 to 0.5 wt % of V, 0.1 to 2.0 wt % of at least of one or two components selected from the group comprising Ni, Cr, Mo, and combinations thereof, and the balance of Fe and inevitable impurities, with respect to 100 wt % of the total steel sheet, and provides a steel sheet for a tool of which the deviation of Rockwell hardness by the position in the width direction is within 5 HRC, and the ratio of those having a wave height in the longitudinal direction within 20 cm is 90% or more with respect to the wave height per 1 m of the steel sheet comprising the central portion in the longitudinal direction of the steel sheet for a tool.