The F-35B is a variant of the F-35 Lightning II, a fifth-generation multirole fighter aircraft developed by Lockheed Martin for the US military and international partners.

The "B" in its name refers to the aircraft's ability to perform short takeoff and vertical landing (STOVL) operations, making it capable of operating from small ships, amphibious assault ships and austere bases with limited runway facilities.

The F-35B is equipped with advanced avionics and stealth capabilities, making it a highly capable platform for air-to-air and air-to-ground missions. It has been in active service with several countries since 2015.