The present invention relates to an access control device having at least one turnstile which has at least one barrier element that forms a turnstile arm and can be moved into a blocking position in which it blocks the access and into an access position in which it opens the access, an illumination device for illuminating the barrier element being provided. According to the invention, the barrier element forms an at least approximately planar illuminating panel that is made of a transparent material at least in sections and is fastened to a turnstile post at one end section and otherwise projects out freely. In particular an on-screen display element can be integrated into the barrier element and/or can form the barrier element, wherein said on-screen display element can be made of electronic paper with an image-storing function for the changeable display of information.