Fabric roller blind with manual actuation, which comprises: - a support frame intended to be fixed to a load-bearing structure in which an opening is made; - a spring winding roller rotatably constrained to said support frame, having a substantially horizontal first rotation axis, and intended to be positioned in the upper part of said opening; - two lateral guideways extended parallel to one another and side-by-side each other along respective first extension directions substantially orthogonal to the first rotation axis of said winding roller, and intended to be fixed to said load-bearing element along respective sides of said opening; - a fabric extended between an upper edge thereof fixed to said winding roller and a lower edge thereof; - a bottom bar, to which the lower edge of said fabric is fixed and which is extended, along a second extension direction parallel to the first rotation axis of said winding roller, between two lateral caps thereof which are slidably engaged in the corresponding lateral guideways; - stop means for locking/releasing said bottom bar with respect to said lateral guideways; characterized in that said stop means comprise: - at least one stop fixed along at least one corresponding said lateral guideway; - at least one handle rotatably mounted on said bottom bar around a second rotation axis (X') parallel to the second extension direction of said bottom bar between at least two angular positions, including a stop position and a disengagement position; - at least one locking pin associated with a corresponding said lateral cap, free to rotate around said second rotation axis (X'); - at least one drive shaft, which mechanically connects said handle to said locking pin in order to transmit the rotary motion of said handle to said locking pin; - elastic means being interposed between said bottom bar and said handle in order to force said handle towards said stop position; said handle being actuatable to be manually moved between said stop position, in which said locking pin is engaged in retention relationship with said stop; and a disengagement position, in which said locking pin is released from said stop. - a support frame intended to be fixed to a load-bearing structure in which an opening is made; - a spring winding roller rotatably constrained to said support frame, having a substantially horizontal first rotation axis, and intended to be positioned in the upper part of said opening; - two lateral guideways extended parallel to one another and side-by-side each other along respective first extension directions substantially orthogonal to the first rotation axis of said winding roller, and intended to be fixed to said load-bearing element along respective sides of said opening; - a fabric extended between an upper edge thereof fixed to said winding roller and a lower edge thereof; - a bottom bar, to which the lower edge of said fabric is fixed and which is extended, along a second extension direction parallel to the first rotation axis of said winding roller, between two lateral caps thereof which are slidably engaged in the corresponding lateral guideways; - stop means for locking/releasing said bottom bar with respect to said lateral guideways; - at least one stop fixed along at least one corresponding said lateral guideway; - at least one handle rotatably mounted on said bottom bar around a second rotation axis (X') parallel to the second extension direction of said bottom bar between at least two angular positions, including a stop position and a disengagement position; - at least one locking pin associated with a corresponding said lateral cap, free to rotate around said second rotation axis (X'); - at least one drive shaft, which mechanically connects said handle to said locking pin in order to transmit the rotary motion of said handle to said locking pin; - elastic means being interposed between said bottom bar and said handle in order to force said handle towards said stop position;