Vertebral body spacer

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

• at least one block body constituted of titanium or a titanium alloy as a main component thereof, and the block body having a pair of contact surfaces to be made contact with the vertebral bodies, respectively, and
• wherein the block body includes needle parts each formed into a needle shape having both end portions and a porous part having through holes passing through the porous part in a thickness direction thereof, and a porosity of at least a surface of the porous part is larger than a porosity of each of the needle parts,
• wherein the needle parts are inserted into the through holes so that the both end portions are projected from the contact surfaces, so that the both end portions exhibit a function of fixing the block body between the vertebral bodies, and
• wherein the pair of the contact surfaces are offset from one another and disposed on opposite sides of the block body, and wherein each contact surface constitutes substantially a planar surface.