A plant operation supporting apparatus includes a display section which displays at least one of an operation procedure screen for displaying an operation procedure defined by components and wiring in a flowchart format, or an operation procedure screen for displaying an operation procedure defined by components and wiring in a logic chart format, and an execution section which supports a plant operation in accordance with the operation procedure being displayed, wherein the display section displays an operation procedure screen for displaying an operation procedure defined by components and wiring in a data flow format, in combination with the operation procedure screen in the data flow format or the operation procedure screen in the logic chart format.