To provide an excavator equipped with a cutter attached bucket chain capable of preventing a bucket mounted to a no-end shaped chain from abrasion and maintaining excavation capacity for a long period of time in the excavator used for forming an excavated trench such as an open ditch and a culvert or the like.

The no-end shaped chain 36 is formed in a no-end shape by alternately connecting an outer link 44 and an inner link 46. The chain 36 is so constituted that a bucket 52 for excavation and lifting conveyance is outside provided to the inner link 44 every predetermined interval and, at the same time, a cutter 56 for reducing the abrasion of the bucket 52 by assisting the excavation is outside provided to the inner link 46 following to the outer link 44 to which the bucket 52 has been outside provided. A moving orbit of the cutter 56 makes the same as that of the bucket 52 or more than that, and as a result, the abrasion of the bucket 52 is reduced to improve the life of the excavator.