A work support apparatus includes a line and point detection unit that acquires drawing data in which a circuit indicating a connection relationship between devices is described by a character, a line, and a point, and detects the line and point based on the drawing data. A drawing sign detection unit detects a drawing sign constituting the circuit. The wiring detection unit detects a wiring connecting the drawing signs based on information on the line and point. The character detection unit detects the character. The circuit connection information generation unit generates circuit connection information. Since the circuit connection information in the same page and over pages of the drawing data is generated, the terminal component detection unit detects, as a terminal component, a wiring or first drawing sign that is not connected to a second drawing sign at least at one end.