Numerical controller capable of partial correction of machining cycle

A numerical controller that generates a machining cycle configured by a plurality of blocks in response to a machining cycle generation command of a machining program, and controls a machine tool by executing the machining cycle, the numerical controller comprising:

• a correction block select unit that selects, from among the plurality of blocks of the machining cycle, a block to be corrected;
• a block correction unit that corrects the block selected by the correction block select unit, and generates correction information of the block based on the correction;
• and
• a correction information storage unit that stores the correction information of the block,
• wherein the machining cycle is generated based on the correction information of the block stored in the correction information storage unit and the machining cycle is executed.