An excitement propagation visualization apparatus comprising: a storage means for storing excitement propagation data indicative of potentials generated by excitement propagation at a plurality of points in an analysis space including a heart at a plurality of points of analysis time in one pulsation period; and a processing means configured for: detecting, based on the excitement propagation data and for the plurality of points of the analysis time, excitement propagation wave fronts (6a through 6i), each of the excitement propagation wave fronts (6a through 6i) being indicative of a boundary between an area in which the potentials exceed a threshold and an area in which the potentials do not exceed the threshold at a point of analysis time, detecting, for the plurality of points of the analysis time, intersections (7a through 7i) of a straight line passing through a first point inside the heart and a second point outside the heart and the excitement propagation wave fronts (6a through 6i), generating, for the plurality of points of analysis time, display objects (9a through 9i) associated with the intersections (7a through 7i) of the straight line and the excitement propagation wave fronts (6a through 6i), the display objects (9a through 9i) including a display object indicative of an expanding state of an excitement propagation wave front and a display object indicative of a contracting state of an excitement propagation wave front, drawing the display objects (9a through 9i) generated for the plurality of points of analysis time at a position of the associated intersection (7a through 7i) in a drawing area indicative of the analysis space, and displaying an image including the display objects (9a through 9i; 62a and 62b). a storage means for storing excitement propagation data indicative of potentials generated by excitement propagation at a plurality of points in an analysis space including a heart at a plurality of points of analysis time in one pulsation period; and a processing means configured for: detecting, based on the excitement propagation data and for the plurality of points of the analysis time, excitement propagation wave fronts (6a through 6i), each of the excitement propagation wave fronts (6a through 6i) being indicative of a boundary between an area in which the potentials exceed a threshold and an area in which the potentials do not exceed the threshold at a point of analysis time, detecting, for the plurality of points of the analysis time, intersections (7a through 7i) of a straight line passing through a first point inside the heart and a second point outside the heart and the excitement propagation wave fronts (6a through 6i), generating, for the plurality of points of analysis time, display objects (9a through 9i) associated with the intersections (7a through 7i) of the straight line and the excitement propagation wave fronts (6a through 6i), the display objects (9a through 9i) including a display object indicative of an expanding state of an excitement propagation wave front and a display object indicative of a contracting state of an excitement propagation wave front, drawing the display objects (9a through 9i) generated for the plurality of points of analysis time at a position of the associated intersection (7a through 7i) in a drawing area indicative of the analysis space, and displaying an image including the display objects (9a through 9i; 62a and 62b). detecting, based on the excitement propagation data and for the plurality of points of the analysis time, excitement propagation wave fronts (6a through 6i), each of the excitement propagation wave fronts (6a through 6i) being indicative of a boundary between an area in which the potentials exceed a threshold and an area in which the potentials do not exceed the threshold at a point of analysis time, detecting, for the plurality of points of the analysis time, intersections (7a through 7i) of a straight line passing through a first point inside the heart and a second point outside the heart and the excitement propagation wave fronts (6a through 6i), generating, for the plurality of points of analysis time, display objects (9a through 9i) associated with the intersections (7a through 7i) of the straight line and the excitement propagation wave fronts (6a through 6i), the display objects (9a through 9i) including a display object indicative of an expanding state of an excitement propagation wave front and a display object indicative of a contracting state of an excitement propagation wave front, drawing the display objects (9a through 9i) generated for the plurality of points of analysis time at a position of the associated intersection (7a through 7i) in a drawing area indicative of the analysis space, and displaying an image including the display objects (9a through 9i; 62a and 62b).