Abstract: A programming system for sequence control including a display, a functional symbol definition memory for storing functional symbols, each for defining one of steps in a sequence showing control procedure for a control object, respectively, a sequential diagram generating and display unit including a sequence table, and an input device for inputting in order the functional symbols along with process contents to be executed in the functional symbols, respectively, into the sequential diagram generating and display unit, which displays the functional symbols along with the process contents as a sequential diagram on a program generating screen of the display and stores the process for each of the steps in the sequence table.