Within the Minimalist Program (MP), Relative clauses (RCs) are considered complementizer clauses (CPs) containing a C with an edge feature [EF] in the form of [wh] and [EPP] but no tense feature. This study investigates Persian RC derivation based on MP. By proposing two approaches, namely: (1) ‘ke-movement’ and (2) ‘null wh-operator (OP) movement’, we will consistently argue and show that the null wh-OP approach provides an appropriate generalization for Persian restrictive RCs. Adopting the latter, the results display Persian RCs can be analyzed as CPs with a null wh-OP assuming to undertake wh-movement as copying and deletion from different syntactic positions, i. e., subject, direct object, object of preposition, etc. This operator allows a small pro in the subject position, leaving an optional null copy, either allowing an optional resumptive pronoun (RP) behind in direct object position or attaching to the verb, and obligatorily in indirect object and object of preposition positions as well as Ezafe-construction. Also, the edge feature of the probe, the complementizer ke, attracts the null wh-OP to Spec-C, for checking and valuing the unvalued [wh] and [EPP] features. The long relative clause derivations can, correspondingly, work as expected by the successive cyclic movement of OP through intermediate Spec-C positions as well.