Disclosed is an analyzing apparatus including a first drive part (71) for rotating a turntable (101) on which an analyzing device is set, a second drive part (72) selectively engaged with the first drive part (71) to reciprocate the analyzing device, and a third drive part (73) for relatively moving the first drive part (71) and the second drive part (72) a position where the first and second drive parts are engaged with each other and a position where the first and second drive parts are not engaged with each other. Thus in the mixing and agitation of a small amount of fluid, necessary acceleration can be obtained even in a short time.