This invention relates to an office chair to be used when relaxing in the office,;In consideration of all the problems occurring in the use of a conventional office chair, the auxiliary seat supporting the calf portion in front of the seat seat hinged to the back frame is pivotally connected and installed.;The bottom of the back frame and the auxiliary sheet is directly connected and installed using a connecting lever,;If you want to lie down in a comfortable and stable posture to use as a chair in an office and to relieve stress or fatigue, the auxiliary frame that supports the back frame and the legs at the same time will be transformed into a comfortable bed. sure,;In addition, by installing various devices, the chair is transformed into a bed and a chair smoothly and smoothly according to the user's weight distribution, and the movement is accurate. The purpose is to help promote health.;The present invention for achieving the above object;The lower side of the back frame 20 is coupled to the hinge 30 at the rear of the pair of main frames 10 so as to be rotatable,;The rear end of the seat frame frame 40 is hinged to the bottom of the back frame frame 20 and both front sides of the seat frame frame 40 are slide spheres 70 coupled to the inclined slide unit 11 in front of the main frame 10. Connected with the installation,;Hinge coupling of the auxiliary sheet 51 to the front end of the seat frame frame 40 is characterized in that it is made by connecting the lower back frame 20 and at least one connection lever (60).
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