In heraldic blazon, a chief is a charge on a coat of arms that takes the form of a band running horizontally across the top edge of the shield. Writers disagree in how much of the shield's surface is to be covered by the chief, ranging from one-fourth to one-third. The former is more likely if the chief is uncharged, that is, if it does not have other objects placed on it. If charged, the chief is typically wider to allow room for the objects drawn there.
The chief is one of the ordinaries in heraldry, along with the bend, chevron, fess, and pale. There are several other ordinaries and sub-ordinaries.
The chief may bear charges and may also be subject to variations of the partition lines. It cannot, however, be cotised. The chief may be combined with another ordinary, such as a pale or a saltire, but is almost never surmounted by another ordinary. The chief will normally be superimposed over a bordure, orle and tressure, if they share the same shield.
A chief combined with a pale.
A chief bearing charges (two scallops).
A chief indented (Fernelmont, Belgium).
A chief wavy (Brinon-sur-Beuvron, France).
Rare example of a chief that occupies half the shield.
A chief fretty (Wolkrange, Belgium).
Rare example of a chief surmounted by another ordinary (a chevron) (Sampigny, France).
A chief impaled.
In some medieval and Renaissance drawings of coats of arms, the chief is drawn even deeper, so that it fills almost all the top half of the shield. In some cases, it is drawn so wide that it will look as though the shield is divided party per fess.
There is a diminutive version of the chief, called a comble, but this does not occur in English and Scottish heraldry.