Provided are: a heterocyclic amide compound represented by formula (1); and a herbicide containing the heterocyclic amide compound. In the formula, G represents a group represented by formula (G-1) or (G-2); each of W and W
1
independently represents an oxygen atom or the like; each of Z
1
and Z
a1
represents a phenyl group or the like; Z
2
represents an aromatic heterocycle; each of R
1
and R
2
independently represents a C
1
-C
6
alkyl group or the like; R
3
represents a hydrogen atom, a C
1
-C
6
alkyl group or the like; and each of R
4
, R
a4
, R
5
, R
a5
, R
6
, R
a6
and R
7
independently represents a hydrogen atom or the like.