A data output device, a data output method, and a data output program capable of allowing a causal relationship in a plurality of items of time-series data to be simply recognized are provided.A data distribution server receives a distribution request from a client terminal, and generates a data display screen which is displayed by the client terminal. The data display screen includes a first display area in which time-series data indicating a transition of a state of a patient or content of medical care performed on the patient is displayed in a graph. In the first display area, association indicators which associate one arbitrary point of each of the plurality of pieces of time-series data can be assigned and displayed.
