This is the Hylian Shield From Majoras Mask, there are different versions but this one only appears in Majoras mask. Although it only appeared in one game it is pretty iconic.

The Hylian Shield (?????? Hairia no Tate?, Hylia Shield) is a recurring shield in the Legend of Zelda series. It is an adult-sized metal heater shield said to be the very same type of shield used by Hylian Knights; though its design varies somewhat between games, one constant is that the Hylian Shield bears the emblem of the Triforce, as well that of a red bird.