A shutter lock with at least one pair of guiding devices arranged opposite each other and spaced apart from each other and further two shutters, which are movable in opposite directions from a locking position to an open position and vice versa along a guide path defined by the guiding devices, each of which shutters consists of a plurality of blades, which, in the section of their ends, run in parallel to each other and are arranged at respectively one of the two guiding devices, which are arranged opposite each other and spaced apart from each other, which blades are articulatedly connected with each other at least in the section of their ends, and each of the two shutters further has a wedge-shaped profile bar, wherein each of the wedge-shaped profile bars forms or comprises one of the front edges of the two shutters that are movable in opposite directions, characterised in that: - the bottom side of a first wedge-shaped profile bar (06-A) forming or comprising a front edge (07-A) of a first shutter (02-A) is located in a plane formed by the bottom side of at least one section of the shutters of the shutter lock in its locking position, and the top side of the profile bar (06-A) is beveled to taper off from the thickness of the shutter from the profile bar's (06-A) rear side facing the blades of the first shutter (02-A) to the front side forming the front edge (07-A) of the first shutter (02-A); - the top side of a second wedge-shaped profile bar (06-B) forming or comprising a front edge (07-B) of a second shutter (02-B) is, at least in the locking position, located in a plane formed by the top side of at least one section of the shutters of the shutter lock in its locking position, and the bottom side of the profile bar (06-B) is beveled to taper off from the thickness of the shutter from the profile bar's (06-B) rear side facing the blades of the second shutter (02-B) to the front side forming the front edge (07-B) of the second shutter (02-B); and - the two wedged-shaped profile bars overlap each other in the locking position. - the bottom side of a first wedge-shaped profile bar (06-A) forming or comprising a front edge (07-A) of a first shutter (02-A) is located in a plane formed by the bottom side of at least one section of the shutters of the shutter lock in its locking position, and the top side of the profile bar (06-A) is beveled to taper off from the thickness of the shutter from the profile bar's (06-A) rear side facing the blades of the first shutter (02-A) to the front side forming the front edge (07-A) of the first shutter (02-A); - the top side of a second wedge-shaped profile bar (06-B) forming or comprising a front edge (07-B) of a second shutter (02-B) is, at least in the locking position, located in a plane formed by the top side of at least one section of the shutters of the shutter lock in its locking position, and the bottom side of the profile bar (06-B) is beveled to taper off from the thickness of the shutter from the profile bar's (06-B) rear side facing the blades of the second shutter (02-B) to the front side forming the front edge (07-B) of the second shutter (02-B); and - the two wedged-shaped profile bars overlap each other in the locking position.