A digital gamma correction circuit includes: a data setting portion for setting set data including a section width W1 and coordinates (Xp,Yp) of a break point P; a coefficient calculation portion for calculating coefficients for straight-line equations representing a broken baseline including a break point and three predetermined approximate line segments for defining a gamma correction broken line approximating an ideal gamma correction curve, the approximate line segments gradually varying in slope in the vicinity of the break point; arithmetic portions for performing arithmetic operations based on the coefficients to subject input data to gamma correction; and a result selection portion for making a suitable selection from among results for the arithmetic operations. Thus, it is possible to obtain a gamma correction broken line approximating an ideal gamma correction curve, and achieve a smooth correction characteristic with a small number of data items.