To provide a compact guide device capable of securing rigidity of a structure.

When necessity of separating fixed blocks 103 for maintenance, for example, a headed bolt 104 is loosened for removal, and a spacer 105 is removed, and the fixed block 102 is fastened again by the headed bolt 104. Continuously, other headed bolt 104 is loosened for removal. Furthermore, after the spacer 105 is removed, the fixed block 102 is fastened by the loosened headed bolt 104. When all the spacers 105 are thereby removed, a head 104a of the headed bolt 104 can pass through a stepped hole 103a, and in the condition wherein the fixed blocks 101 and 102 are fixed by the headed bolt 104, the fixed block 103 is drawn upward for independent separation.