Favorable measurement workability is obtained by further enhancing a degree of freedom in handling a probe while enhancing measurement accuracy. A probe for a three-dimensional scanner includes a first marker block and a second marker block that are arrayed side by side in a first direction with a scanner unit positioned at a center, and a third marker block and a fourth marker block that are arrayed side by side in a second direction with the scanner unit positioned at the center. The marker blocks have self-luminous markers facing a plurality of directions, respectively. The fourth marker block is arranged to be separated from a plane defined by the first marker block, the second marker block, and the third marker block.