To provide a plastic hollow plate which is excellent in handleability and safety, and is suitable for a use as a part of furniture as well.

The plastic hollow plate includes a plastic plate body 2 in a hollow structure, roughly straight linear sealing bodies 3 capable of sealing the entire area or the almost entire area of each side forming the opened end part of the plastic plate body 2, and corner connecting bodies 4 disposed between the end parts of the adjacent linear sealing bodies 3 in the state of being capable of connecting the end parts with each other. As the respective linear sealing bodies 3 and the respective corner connecting bodies 4, an outer surface part 33 and a corner outer surface part 44 are applied, which have partially arcuate rounded parts 3a and first corner rounded parts 4a having expansion in the thickness direction, respectively.