A bicycle simulator comprising: a frame support portion for supporting a bicycle frame, the bicycle frame connecting front and rear wheels of the bicycle; and a base portion supporting the frame support portion, wherein the frame support portion comprises: a first support bar having one end portion thereof fixed to the bicycle frame; a second support bar having one end portion thereof fixed to the base portion and comprising a plurality of holes; a connection portion for connecting the other end portion of the second support bar and the other end portion of the first support bar and connecting the first support bar to be rotatable about one axis with respect to the second support bar; and a rotation controller having one end fixed to one end of the first support bar and other end fixed to the base portion and limiting a rotation angle of the first support bar with respect to the second support bar and restoring a position of the rotated first support bar, characterized by a rotation slide portion disposed on one end of the second support bar; a rotation slide guide engaged with the rotation slide portion provided at one end portion of the second support bar to guide a rotation of the second support bar; and a rotation restraint portion inserted into each of the plurality of holes, limiting the rotation of the second support bar about an axis normal to the base portion. a frame support portion for supporting a bicycle frame, the bicycle frame connecting front and rear wheels of the bicycle; and a base portion supporting the frame support portion, wherein the frame support portion comprises: a first support bar having one end portion thereof fixed to the bicycle frame; a second support bar having one end portion thereof fixed to the base portion and comprising a plurality of holes; a connection portion for connecting the other end portion of the second support bar and the other end portion of the first support bar and connecting the first support bar to be rotatable about one axis with respect to the second support bar; and a rotation controller having one end fixed to one end of the first support bar and other end fixed to the base portion and limiting a rotation angle of the first support bar with respect to the second support bar and restoring a position of the rotated first support bar, characterized by a rotation slide portion disposed on one end of the second support bar; a rotation slide guide engaged with the rotation slide portion provided at one end portion of the second support bar to guide a rotation of the second support bar; and a rotation restraint portion inserted into each of the plurality of holes, limiting the rotation of the second support bar about an axis normal to the base portion. a first support bar having one end portion thereof fixed to the bicycle frame; a second support bar having one end portion thereof fixed to the base portion and comprising a plurality of holes; a connection portion for connecting the other end portion of the second support bar and the other end portion of the first support bar and connecting the first support bar to be rotatable about one axis with respect to the second support bar; and a rotation controller having one end fixed to one end of the first support bar and other end fixed to the base portion and limiting a rotation angle of the first support bar with respect to the second support bar and restoring a position of the rotated first support bar, characterized by a rotation slide portion disposed on one end of the second support bar; a rotation slide guide engaged with the rotation slide portion provided at one end portion of the second support bar to guide a rotation of the second support bar; and a rotation restraint portion inserted into each of the plurality of holes, limiting the rotation of the second support bar about an axis normal to the base portion.