To provide a herbicidal composition having a broad herbicidal spectrum, having high activity and having a long-lasting effect, whereby the dose of the herbicidally active ingredients can be reduced. By combining a compound represented by the following formula (I) with another herbicidal compound, it is possible to provide a herbicidal composition having a broad herbicidal spectrum, having high activity and having a long-lasting effect. A herbicidal composition comprising a herbicidal compound represented by the formula (I) or its salt: wherein X, R1, R2, Q and n are as disclosed in the specification, and another herbicidal compound, and a method for controlling weeds or inhibiting their growth by means of the herbicidal composition.
