Abstract: A variable pitch propeller assembly having a shaft mounted in a housing and operably connectable to a rotary power source. A means mounted on the shaft has a propeller blade pivotally mounted therewith. The blade has a stem portion pivotally mounted in the means. A cam is rotatably mounted in the housing and has an inclined portion angularly disposed relative to the shaft. Another means is slidably mounted in the housing and positioned between the cam and the first-named means and having a cam follower engaged with the inclined portion of the cam and having a guide means oppositely disposed to the cam follower. A rotatable member is positioned between the means slidably mounted and the first-named means and it has guide means follower engaged with the guide means and members connected with the stem portion of the propeller blade.