A transmissive head mounted display apparatus includes an image display unit configured to transmit an external scene and display an image of a display target viewable with the external scene, an imaging unit, a target identifying unit configured to identify, from a captured image captured by the imaging unit, a target of a task predetermined as a task that a user of the transmissive head mounted display apparatus needs to perform, a task occurrence determination unit configured to determine, based on a state of the target in the captured image, whether the task has occurred or not, and a display controller configured to cause the image display unit to display related information relating to the task when the task is determined to have occurred.