Shelving system with plug-in connection comprising: - base elements, which in each case possess a width dimension along a width direction and a depth dimension along a depth direction running perpendicularly to the width direction and which in each case has at least two through openings with an opening width (b) extending in the width direction of the respective base element and an opening length extending in the depth direction of the respective base element, wherein the through openings in the width direction of the respective base element are spaced apart from each other, and - wall elements, which in each case possess a height dimension along a height direction, a depth dimension along a depth direction perpendicular to the height direction and a width dimension along a width direction perpendicular to the height direction and to the depth direction and which in each case has two end faces (7A, 7B) placed on opposite ends in the height direction, wherein - the end faces (7A, 7B) of each wall element have hook-like protrusions, the hook shape of which is formed in a plane defined by the height direction and the depth direction of the respective wall element and whose dimension in the depth direction of the respective wall element at maximum corresponds to the distance between two hook-like protrusions, and - the hook-like protrusions are arranged at the end faces (7A, 7B) in such a manner that the hook-like protrusions of end faces (7A, 7B), lying opposite each other, of two wall elements can be positively engaged with one another, wherein - the end faces (7A, 7B) of the wall elements in the depth direction of the respective wall element have a dimension, which is greater than the opening length of the through openings, and the hook-like protrusions are spaced apart from the ends, seen in the depth direction, of the end face (7A, 7B) of the respective wall element, characterized in that - the dimension of each of the hook-like protrusions in the depth direction of the respective wall element in each case substantially corresponds to the distance between two hook-like protrusions in the depth direction of the respective wall element, and - the dimension of the hook-like protrusions in the width direction of the respective wall element corresponds to the opening width (b) of the through openings of the base elements. - base elements, which in each case possess a width dimension along a width direction and a depth dimension along a depth direction running perpendicularly to the width direction and which in each case has at least two through openings with an opening width (b) extending in the width direction of the respective base element and an opening length extending in the depth direction of the respective base element, wherein the through openings in the width direction of the respective base element are spaced apart from each other, and - wall elements, which in each case possess a height dimension along a height direction, a depth dimension along a depth direction perpendicular to the height direction and a width dimension along a width direction perpendicular to the height direction and to the depth direction and which in each case has two end faces (7A, 7B) placed on opposite ends in the height direction, wherein - the end faces (7A, 7B) of each wall element have hook-like protrusions, the hook shape of which is formed in a plane defined by the height direction and the depth direction of the respective wall element and whose dimension in the depth direction of the respective wall element at maximum corresponds to the distance between two hook-like protrusions, and - the hook-like protrusions are arranged at the end faces (7A, 7B) in such a manner that the hook-like protrusions of end faces (7A, 7B), lying opposite each other, of two wall elements can be positively engaged with one another, wherein - the end faces (7A, 7B) of the wall elements in the depth direction of the respective wall element have a dimension, which is greater than the opening length of the through openings, and the hook-like protrusions are spaced apart from the ends, seen in the depth direction, of the end face (7A, 7B) of the respective wall element, characterized in that - the dimension of each of the hook-like protrusions in the depth direction of the respective wall element in each case substantially corresponds to the distance between two hook-like protrusions in the depth direction of the respective wall element, and - the dimension of the hook-like protrusions in the width direction of the respective wall element corresponds to the opening width (b) of the through openings of the base elements.