A numerical controller capable of determining whether or not an input numerical value of an operator is within a range of a limit value includes: an input receiving unit receiving various operations of the operator and input of numerical values for input items; an input numerical value limiting unit determining whether or not the input numerical value is within the range of the limit value; a limit value changing unit changing the limit value when the input receiving unit receives a specific operation; and a limit value restoring unit restoring the limit value to a value before the change when the specific operation is completed.