Apparatus to separate bars comprising: - a plurality of movement groups defining a support plane for said bars, said movement groups being configured to move said bars in a direction of movement, and - a plurality of separation units configured to separate one group of bars from said bars, wherein said movement groups are distanced from each other in a direction transverse to said direction of movement so that interspaces are defined between them, and each separation unit is positioned in one of said interspaces comprised between two of said movement groups, wherein each of said separation units comprises: - a dividing device provided with a support element having a support surface parallel to said support plane and suitable to support said bars, and a dividing element installed at one end of said support element and located, in at least one of its operating conditions, protruding with respect to said support surface in order to divide the bars located upstream with respect to the bars located downstream of said dividing element, and - a lifting device configured to take said dividing device into at least a first operating position and a second operating position, in which said support surface is located under or aligned and respectively above said support plane, wherein said dividing element comprises a tooth, positionable protruding in a direction transverse to said support plane, characterized in that said dividing element comprises an actuator configured to move said tooth from an inactive position, in which it is positioned under said support surface, to an active position, in which it protrudes with respect to said support surface, and vice versa, in that said lifting device comprises a base body and a support body installed sliding with respect to said base body in a direction incident against said support plane, said support body being suitable to support said dividing device, and in that said lifting device comprises an actuation member connected to said base body and to said support body and provided to determine the sliding of the latter with respect to said base body. - a plurality of movement groups defining a support plane for said bars, said movement groups being configured to move said bars in a direction of movement, and - a plurality of separation units configured to separate one group of bars from said bars, wherein said movement groups are distanced from each other in a direction transverse to said direction of movement so that interspaces are defined between them, and each separation unit is positioned in one of said interspaces comprised between two of said movement groups, wherein each of said separation units comprises: - a dividing device provided with a support element having a support surface parallel to said support plane and suitable to support said bars, and a dividing element installed at one end of said support element and located, in at least one of its operating conditions, protruding with respect to said support surface in order to divide the bars located upstream with respect to the bars located downstream of said dividing element, and - a lifting device configured to take said dividing device into at least a first operating position and a second operating position, in which said support surface is located under or aligned and respectively above said support plane, wherein said dividing element comprises a tooth, positionable protruding in a direction transverse to said support plane,