To provide a ceramic/magnesium alloy joined body and a method for manufacturing the same. The purpose of the prevent invention is to obtain a ceramic that has high strength despite being a compact, slim component such as a portable electronic device or a watch member. Magnesium alloy is heated to 420 DEG C or higher in an inert atmosphere relative to ceramic, and is directly joined to oxide ceramic by utilizing the oxidizing power of magnesium.本發明係提供陶瓷/鎂合金接合體及其製造方法。其目的為製得即使用於攜帶用電子裝置、時鐘元件等的小型、薄型元件,亦有高強度的陶瓷。將鎂合金在惰性氛圍氣下加熱至420℃以上,並利用鎂的氧化力使氧化物與陶瓷直接接合之。1‧‧‧陶瓷2‧‧‧鎂(合金)