A reflective unit is provided to reduce the manufacturing cost and to simplify the manufacturing process. A reflective unit is composed of a base unit, a mirror unit(10) reflecting the light, a frame unit(20) which elastically supports the mirror unit, and two or more regulating units passing through the frame part. The regulating units connect the frame unit to the base unit, and controls the distance between the frame unit and the base unit. The frame unit is composed of a square supporting frame(22) supporting the mirror, a first elastic frame(24) in which a first through-hole is formed in the one side edge of the supporting frame, a second elastic frame(26) in which a second through-hole is formed in the diagonal opposite side of the first elastic frame, and a third elastic frame(28) formed in the other edge except the edge in which the first and second elastic frames are formed.
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