Vertebral body spacer

A vertebral body spacer to be used by being inserted between vertebral bodies, comprising;

• a pair of block bodies, each block body having a pair of contact surfaces configured to contact the vertebral bodies, and
• a connecting portion rotatably connecting the pair of block bodies to each other,
• wherein the block body includes a frame-shaped dense part having a porosity of 10 to 40% and a porous part provided inside the dense part, and a porosity of at least a surface of the porous part is larger than a porosity of the dense part, wherein the porous part and the dense part of each block body are constituted of titanium or a titanium alloy as a main component thereof,
• wherein the dense part includes a first frame portion configured to contact one of the vertebral bodies and a second frame portion configured to contact the other of the vertebral bodies,
• wherein one surface of the pair of contact surfaces is constituted from the first frame portion of the dense part and the porous part, and the other surface of the pair of contact surfaces is constituted from the second frame portion of the dense part and the porous part, and
• wherein each surface of the pair of contact surfaces constitutes a flat surface.