Wood planing machine

A wood planing machine comprising:

• a base having a work table, a plurality of spaced apart posts that extend upright from said work table and that respectively have top end portions, and a seat mounted securely on said top end portion of at least one of said posts;
• a cutter carriage mounted on said posts above said work table and below said top ends of said posts, and movable along lengths of said posts;
• a rotary cutter mounted on said cutter carriage;
• a height adjusting unit for adjusting height of said cutter carriage relative to said work table;
• and
• a height indicator including a lever having one end mounted on said seat and the other end projecting upwardly from said seat, a roller guide unit including a first roller guide pivoted on said other end of said lever, and a flexible string passing through said first roller guide, and having two opposite ends extending downwardly from said first roller guide, one of said opposite ends of said string being secured to said cutter carriage, said height indicator further including an urging member that has one end connected to said work table, and the other end connected to the other one of said opposite ends of said string for urging said string, said string being tensioned by said urging member, being movable along with said cutter carriage, and having a reference segment that extends between said opposite ends of said lever and that is exposed from said lever so that moving distance of said reference segment can be measured reference to said lever.