In this paper, we portray the principal ideals of a commutative regular rough monoid of idempotents (T, ∆) and (T, ∇) and we give the sufficient condition for the principal ideals (T, ∆) and (T, ∇) also we describe some of its properties with respect to the defined binary operations ∆ and ∇. We delineate these ideas through examples. © 2020, Research Publication. All rights reserved.