To provide a medical instrument supporting unit in which a doctor, nurse, and veterinarian can grasp the positions of various medical instruments at a glance and which they can immediately take up any in hand.

The medical instrument supporting unit 100 can freely move in any direction on a floor face by casters 14a, 14b, 14c, 14d set on a foot part 10. A support section 15 is flexible by lifting up/down an upper support material 17 relative to a lower support material 16, and further, rotatably supports an upper stage mount 20 and a hanger arm 46 at a mounting section 18. Since a middle stage mount 25 is also supported in a rotatable state by a clamp support arm 30, positions or directions of them can be respectively adjusted so that the upper stage mount 20 and the middle stage mount 25 may not overlap each other viewing from a doctor, nurse, and veterinarian.