An ultrasound diagnosis apparatus comprising: a probe which transmits and receives ultrasound and outputs received data; a coordinate measuring unit which measures at least one of a spatial position and orientation of the probe and outputs coordinate data representing a result of measurement; a storage unit which includes a received data memory which stores the received data and a coordinate data memory which stores coordinate data correlated to the received data; a read controller unit which reads from the received data memory the received data, and reads from the coordinate data memory the coordinate data correlated to the read received data in a replay display mode; a living body image generator unit which generates a living body image based on the received data; a reference image generator unit which generates a reference image based on the coordinate data; and a display unit which displays the living body image and the reference image characterized in - that the storage unit further stores mark type information which comprises body mark type information which is information regarding body mark type and probe mark type information which is information regarding probe mark type, - wherein the body mark type information and the probe mark type information are referred to during generation of the reference image and the reference image is generated based on these pieces of information, - wherein the living body image generator unit generates the living body image based on the read received data and - wherein the reference image generator generates the reference image based on the read coordinate data and the mark type information, and - the reference image contains a body mark and a probe mark, - that the received data memory is a cine-memory having a ring buffer structure, and - that the coordinate data memory is a coordinate data table having a ring buffer structure. a probe which transmits and receives ultrasound and outputs received data; a coordinate measuring unit which measures at least one of a spatial position and orientation of the probe and outputs coordinate data representing a result of measurement; a storage unit which includes a received data memory which stores the received data and a coordinate data memory which stores coordinate data correlated to the received data; a read controller unit which reads from the received data memory the received data, and reads from the coordinate data memory the coordinate data correlated to the read received data in a replay display mode; a living body image generator unit which generates a living body image based on the received data; a reference image generator unit which generates a reference image based on the coordinate data; and a display unit which displays the living body image and the reference image characterized in - that the storage unit further stores mark type information which comprises body mark type information which is information regarding body mark type and probe mark type information which is information regarding probe mark type, - wherein the body mark type information and the probe mark type information are referred to during generation of the reference image and the reference image is generated based on these pieces of information, - wherein the living body image generator unit generates the living body image based on the read received data and - wherein the reference image generator generates the reference image based on the read coordinate data and the mark type information, and - the reference image contains a body mark and a probe mark, - that the received data memory is a cine-memory having a ring buffer structure, and - that the coordinate data memory is a coordinate data table having a ring buffer structure. - that the storage unit further stores mark type information which comprises body mark type information which is information regarding body mark type and probe mark type information which is information regarding probe mark type, - wherein the body mark type information and the probe mark type information are referred to during generation of the reference image and the reference image is generated based on these pieces of information, - wherein the living body image generator unit generates the living body image based on the read received data and - wherein the reference image generator generates the reference image based on the read coordinate data and the mark type information, and - the reference image contains a body mark and a probe mark, - that the received data memory is a cine-memory having a ring buffer structure, and - that the coordinate data memory is a coordinate data table having a ring buffer structure.