Sequence-program-debugging supporting apparatus

A sequence-program-debugging supporting apparatus includes a configuration editing unit that receives a disabling unit from a PLC, a variable retaining unit that retains variables used by units on a sequence program, a program editing unit that can edit the sequence program, a converting unit that converts the sequence program into an execution code, a searching unit that acquires variables used by the disabling unit from the variable retaining unit and searches for places where the acquired variables are used in the sequence program, and a disabling setting unit that writes a section of the execution code corresponding to the places in a disabling section setting file as a disabling section not to be executed, and an execution control unit that controls, based on the disabling section setting file, an executing unit not to execute the disabling section.