Ultrasound diagnosis apparatus and a medical picture projection apparatus are provided, simply operating the apparatus in a less loaded posture without losing the variety of operation functions, comprising: an ultrasound probe signal processor a display controller a projector storage a determining unit and a controller. The ultrasound probe scans a subject using ultrasound waves. Signal processor applies signal processing on a first output signal from the ultrasound probe. The display controller causes displaying images based on second output signal from signal processor. The projector projects pictures. Storage preliminarily stores first related information associating an area corresponding to a picture with the operation content among the ultrasound probe, signal processor, the display controller, and the projector. The determining unit determines whether or not at least one part of an object is located within the area indicated in first related information. The controller is based on determination results from determining unit and first related information.
