A hedge trimmer capable of effectively increasing the rigidity of a cutter assembly as well as reducing its weight, and easily adjusting the clearance for sliding of cutters, thereby improving the operability and addressing degradation of the cutting performance of the cutters. In the cutter assembly 20, upper and lower cutter supports 31 and 32 are provided with a plurality of clamping portions 40 at predetermined intervals for increasing the rigidity, each clamping portion 40 having a square tube-like spacer 44 and a first bolt 45. In addition, at least one adjusting portion 50 having a second bolt 52 for adjusting the separation distance between the upper and lower cutter supports 31 and 32 is provided between adjacent clamping portions 40.
