Fabric roller blind, which comprises: - a support frame comprising at least one lateral upright, intended to be fixed to a load-bearing structure at an opening thereof, - at least one lateral abutment element, opposite said lateral upright; - a take-up roller having a substantially vertical rotation axis, mechanically associated with the lateral upright of said support frame; - a fabric extended between a first lateral edge thereof, fixed to said take-up roller and a second lateral edge thereof opposite said first lateral edge; - a handle bar, which is fixed to the second lateral edge of said fabric, and which is provided with an axial cavity, is extended along an extension axis substantially parallel to the rotation axis of said take-up roller between a lower termination and an upper termination and is movable between: - an open position, in which said handle bar is placed in a position side-by-side said lateral upright, freeing said opening of said fabric, - a closed position, in which said handle bar is placed in a distal position with respect to said lateral upright and in abutment against said lateral abutment element to cover said opening with said fabric; - synchronization means for synchronizing the advancement of the terminations (7, 8) of said handle bar during its movement between the open position and the closed position; wherein said synchronization means comprise: - an upper guide chain, susceptible of being extended at the top of said opening and provided with a first internal end housed inside said handle bar and slidable therein, and with a first external end connected to said lateral abutment element or to said lateral upright; - a lower guide chain susceptible of being extended at the lower part of said opening and provided with a second internal end housed inside said handle bar and slidable therein, and with a second external end connected to said lateral abutment element or to said lateral upright; said blind being characterized in that said second external end is connected - either to said lateral upright, with said first external end connected to said lateral abutment element, - or to said lateral abutment element, with said first external end connected to said lateral upright; the first and the second internal ends (10A, 11A), respectively of said upper guide chain and of said lower guide chain, being mechanically connected to each other in order to be jointly moved within said handle bar. - a support frame comprising at least one lateral upright, intended to be fixed to a load-bearing structure at an opening thereof, - at least one lateral abutment element, opposite said lateral upright; - a take-up roller having a substantially vertical rotation axis, mechanically associated with the lateral upright of said support frame; - a fabric extended between a first lateral edge thereof, fixed to said take-up roller and a second lateral edge thereof opposite said first lateral edge; - a handle bar, which is fixed to the second lateral edge of said fabric, and which is provided with an axial cavity, is extended along an extension axis substantially parallel to the rotation axis of said take-up roller between a lower termination and an upper termination and is movable between: - an open position, in which said handle bar is placed in a position side-by-side said lateral upright, freeing said opening of said fabric, - a closed position, in which said handle bar is placed in a distal position with respect to said lateral upright and in abutment against said lateral abutment element to cover said opening with said fabric; - an open position, in which said handle bar is placed in a position side-by-side said lateral upright, freeing said opening of said fabric, - a closed position, in which said handle bar is placed in a distal position with respect to said lateral upright and in abutment against said lateral abutment element to cover said opening with said fabric; - synchronization means for synchronizing the advancement of the terminations (7, 8) of said handle bar during its movement between the open position and the closed position; - an upper guide chain, susceptible of being extended at the top of said opening and provided with a first internal end housed inside said handle bar and slidable therein, and with a first external end connected to said lateral abutment element or to said lateral upright; - a lower guide chain susceptible of being extended at the lower part of said opening and provided with a second internal end housed inside said handle bar and slidable therein, and with a second external end connected to said lateral abutment element or to said lateral upright; - either to said lateral upright, with said first external end connected to said lateral abutment element, - or to said lateral abutment element, with said first external end connected to said lateral upright;