The events of transferring the proprietary from the demised person to the other party is called inheritance. Up to now Indonesia applies three inheritance law applicable for certain inhabitant classification namely the local inheritance legal system and the Islamic legal system. Under civil code, three consists of two wats of inheritance distribution namely one that automatically and regulatory occurs based on the heirs classification, and the other through the last will.There sometimes exists a conflict as to the division of inheritance in particular in respect of the heirs respective entitlement right. The objective of this thesis writing is to get the inheritance legal matters solved and to comprehend as to the role of the notary and government institutionin dealing with the inheritance excecution by way of the last will. There sometimes exists a conflict as to the division of inheritance in particular in respect of heirs entitlement right. The objective to this thesis writing is to get the inheritance legal matter solved and to comprehend as to the role of the Notary and government institution in dealing with the inheritance excecution by way of last will. By conducting a normative legal research method, case analysis and library study, they can explain the role of notary in preparing deeds and letter in relation to the will inheritance and the notary’s relation with governmental institutions namely the inheritance body of Ministry Law and The Ministry of Land. These institutions partnering with the Notary in providing law certainly and protection to protect the interest of the relevant parties. The results of this reseatch reveal the very key role of the Notary in preparing documents both prior to and after the death of a person, and the Notary in collaboration with the institutions would provide legal certainty and protection to protect the interest of the relevant parties.