The present invention relates to a slew rate improvement circuit. According to an embodiment of the present invention, the slew rate improvement circuit, which controls current flows of a first current source, includes: a first transistor which is arranged between a first power source and an eleventh node and connects gate electrodes between the first power source and the eleventh node; a third current source which has a side connected to a second power source lower than the first power source; a second transistor connected between the first power source and the eleventh node; a third transistor which is connected between the eleventh node and the other side of the third current source while enabling gate electrodes to receive a first control voltage; a fourth transistor which is connectedbetween the first power source and a twelfth node and connects the gate electrodes between gate electrodes of the second transistor and the twelfth node; and a fifth transistor which is connected tothe other side of the third current source and the twelfth node while enabling the gate electrodes to receive a second control voltage.