The present invention relates to side masking for a move theater, capable of improving the quality of movie viewing for an audience. The present invention comprises a rail part, a masking part, a moving part, and a driving part. The rail part includes a first rail section extended in a longitudinal direction and a second rail section bent in a symmetrical shape bilaterally at both ends of the first rail section. The masking part includes a plurality of curtain rings connected to the rail part to be movable along the rail part and a curtain connected to the curtain ring. The moving part is connected to the masking part and moves the masking part in the longitudinal direction of the rail part. The driving part includes a motor for driving the moving part, a wire connected to the motor and the moving part, and an angle wheel for supporting the wire and capable of changing the direction. The moving part includes a first member and a second member.;COPYRIGHT KIPO 2017
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