A security element for securing a value document or a security paper, wherein the security element has a layer structure with the following layer sequence: a) a first foil substrate; b) a fi rst embossi ng lacquer layer; c) a first semitransparent functional layer; d) a printed layer applied to the first semitransparent functional layer; e) an adhesive layer; f) a second semitransparent functional layer; g) a second embossi ng lacquer layer; h) a second foil substrate; wherein - the vi ewi ng of the security element with respect to the fi rst foil substrate a) from the side opposite the layers b) to h) defines the viewing of the security-element front side and the viewing of the security element with respect to the second foil substrate h) from the si de opposite the layers a) to g) defines the vi ewi ng of the security-el ement back side; - the first semitransparent functional layer c) forms a first motif that is recognizable when viewing the security-element front side in incident light; - the semitransparent second functional layer f) forms a second motif that is recognizable when viewing the security-element back side in incident light; characterized in that - the printed layer d) applied to the first semitransparent functional layer forms a hidden third motif that is not recognizable when viewi ng the security-element front side in incident light and is covered by the first semitransparent functional layer c) and that is not recognizable when viewing the security-element back side in incident light and is covered by the second semitransparent functional layer f) and that is recognizable when viewing the security element in transmitted light both from the front side and from the back side. a) a first foil substrate; b) a fi rst embossi ng lacquer layer; c) a first semitransparent functional layer; d) a printed layer applied to the first semitransparent functional layer; e) an adhesive layer; f) a second semitransparent functional layer; g) a second embossi ng lacquer layer; h) a second foil substrate; wherein - the vi ewi ng of the security element with respect to the fi rst foil substrate a) from the side opposite the layers b) to h) defines the viewing of the security-element front side and the viewing of the security element with respect to the second foil substrate h) from the si de opposite the layers a) to g) defines the vi ewi ng of the security-el ement back side; - the first semitransparent functional layer c) forms a first motif that is recognizable when viewing the security-element front side in incident light; - the semitransparent second functional layer f) forms a second motif that is recognizable when viewing the security-element back side in incident light; characterized in that - the printed layer d) applied to the first semitransparent functional layer forms a hidden third motif that is not recognizable when viewi ng the security-element front side in incident light and is covered by the first semitransparent functional layer c) and that is not recognizable when viewing the security-element back side in incident light and is covered by the second semitransparent functional layer f) and that is recognizable when viewing the security element in transmitted light both from the front side and from the back side. - the vi ewi ng of the security element with respect to the fi rst foil substrate a) from the side opposite the layers b) to h) defines the viewing of the security-element front side and the viewing of the security element with respect to the second foil substrate h) from the si de opposite the layers a) to g) defines the vi ewi ng of the security-el ement back side; - the first semitransparent functional layer c) forms a first motif that is recognizable when viewing the security-element front side in incident light; - the semitransparent second functional layer f) forms a second motif that is recognizable when viewing the security-element back side in incident light; characterized in that - the printed layer d) applied to the first semitransparent functional layer forms a hidden third motif that is not recognizable when viewi ng the security-element front side in incident light and is covered by the first semitransparent functional layer c) and that is not recognizable when viewing the security-element back side in incident light and is covered by the second semitransparent functional layer f) and that is recognizable when viewing the security element in transmitted light both from the front side and from the back side.