Circular saw

A circular saw comprising:

• a worktable having front and rear ends opposite to each other in a longitudinal direction;
• a mounting seat extending from said rear end of said worktable upwardly, and having a top end distal from said rear end;
• a blade supporting unit including a pivot end which is pivotally connected to said top end about a pivot axis in a transverse direction relative to the longitudinal direction, a free end which is turnable about the pivot axis to be close to and away from said front end of said worktable, and a middle mounting portion which is interposed between said pivot end and said free end;
• a motor mounted securely on said mounting seat, and having an output shaft which extends along an output shaft axis that is parallel to the pivot axis for delivering a driving force;
• a saw blade shaft mounted on and rotatable relative to said middle mounting portion of said blade supporting unit about a blade axis parallel to the output shaft axis, and having a driven end which is disposed laterally of said middle mounting portion, and a coupling end which is opposite to said driven end along the blade axis;
• a saw blade mounted on and rotated with said coupling end of said saw blade shaft;
• and
• a drive transmission unit disposed to transmit the driving force of said output shaft to said driven end of said saw blade shaft so as to rotate said saw blade about the blade axis.