A multidirectional support structure for tablet display apparatus includes a support member having a first end section and a second end section opposite to the first end section. The first end section is pivotally connected with an angle adjustment seat. The angle adjustment seat is further pivotally connected with a rotatable connection assembly. The connection assembly is formed with a receiving space for receiving the tablet display apparatus. The second end section of the support member is pivotally connected with one side of a base seat. The other side of the base seat is pivotally connected with a board body. The board body can be connected with multiple press keys as necessary to form a keyboard. Accordingly, the tablet display apparatus can be co-used with the keyboard and rotated and tilted by different angles and supported in different inclined positions.