Locking assembly for pieces of furniture , comprising: - a latch used to lock drawers or panel doors of the piece of furniture in closed position; said latch being suitable for being slidingly mounted on one side (T1) of a frame (T) of the piece of furniture ; - an actuation arm suitable for being engaged against a striking element of the latch in order to actuate the latch , in such a way that said latch is in a locking position, wherein it locks the drawers or the door panels in closed position, and in an unlocking position, wherein it permits the free movement of the drawers or door panels; - a support from where the actuation arm , which is integral with the support , projects; - an electrical motor (M) comprising a shaft (M1) to which the support is fixed, in such a way that said support is integral with the shaft (M1) of the electrical motor (M); - a management and control unit (G) for managing and controlling the electrical motor (M); - a box that houses the electrical motor (M), in such a way that the electrical motor (M) is integral with the box ; said box being suitable for being slidingly mounted in the interior of the side (T1) of the frame (T) of the piece of furniture; - a manual security device connected to the box to make the box slide; characterized in that : the actuation arm projects from the box towards the latch ; the manual security device is configured in such a way to make the box slide from a proximal position relative to the latch to a distal position relative to the latch . - a latch used to lock drawers or panel doors of the piece of furniture in closed position; said latch being suitable for being slidingly mounted on one side (T1) of a frame (T) of the piece of furniture ; - an actuation arm suitable for being engaged against a striking element of the latch in order to actuate the latch , in such a way that said latch is in a locking position, wherein it locks the drawers or the door panels in closed position, and in an unlocking position, wherein it permits the free movement of the drawers or door panels; - a support from where the actuation arm , which is integral with the support , projects; - an electrical motor (M) comprising a shaft (M1) to which the support is fixed, in such a way that said support is integral with the shaft (M1) of the electrical motor (M); - a management and control unit (G) for managing and controlling the electrical motor (M); - a box that houses the electrical motor (M), in such a way that the electrical motor (M) is integral with the box ; said box being suitable for being slidingly mounted in the interior of the side (T1) of the frame (T) of the piece of furniture; - a manual security device connected to the box to make the box slide; characterized in that : the actuation arm projects from the box towards the latch ; the manual security device is configured in such a way to make the box slide from a proximal position relative to the latch to a distal position relative to the latch . the actuation arm projects from the box towards the latch ; the manual security device is configured in such a way to make the box slide from a proximal position relative to the latch to a distal position relative to the latch . <EOS>