Abstract: A field glasses comprising a flat, rectangular bottom shell, a flat, rectangular cover shell, an object lens assembly pivoted to said bottom shell at one end and supported by a torsional spring into a vertical position, an eyepiece assembly pivoted to said bottom shell at an opposite end and supported by a torsional spring into a vertical position permitting the eyepieces thereof to be respectively in line with the object lenses on said object lens assembly, and two opposite folding side strips foldably connected between said bottom shell and said cover shell at two opposite sides. Pushing said object lens assembly and said eyepiece assembly inwards respectively causes the field glasses to be collapsed into a flat, pocket size structure for carrying in a pocket.