摆钟，是使用一个摇摆重的钟摆，靠能的相互转化来摆动，是时钟的一种。1656年由克里斯蒂安·惠更斯发明，取代重力齿轮推动的时钟，直到1930年代都是世界上最精确的计时时钟。

1667年，惠更斯在钟摆上加了1个齿轮，令其更加可靠，但无法在颠簸摇晃的船上使用。最后用1具由两个弹簧推动的摆轮代替钟摆，从而造出航海钟。

A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is a harmonic oscillator; it swings back and forth in a precise time interval dependent on its length, and resists swinging at other rates. From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world's most precise timekeeper, accounting for its widespread use. Throughout the 18th and 19th centuries pendulum clocks in homes, factories, offices and railroad stations served as primary time standards for sche****ng daily life, work shifts, and public transportation, and their greater accuracy allowed the faster pace of life which was necessary for the Industrial Revolution.