The RA Prosecutor's Service began to act on December 6' 1918, when the Council of the first Republic of Armenia passed the Law "On Implementation of the Previous Russian Empire Laws on the territory of Armenia". The Law especially prescribed that on the territory of the Republic of Armenia, were previously acting temporary Laws of Previous Russian Empire with the amendments and changes done by the Temporary Government, the Caucasian Commissariat, the Seim (Parliament) and the Armenian Council. On the same day the Armenian Council passed also the Law concerning transformation of the Russian Empire's Court System model into the Armenian legislation. That time the RA Prosecutor's Service was acting attached to the Court System.
The RA Prosecutor's Service first was created as a separate institution after the establishment of Soviet Regime. Following the example of Soviet Russia, the tasks of establishment of the united legality in the whole territory of Armenia and of organization of the straggle against crime was assigned to the SSRA Prosecutor's Office, which was created on July 22' 1922. However, it was held as a separate institution for a short period of time. In December' 1922, by creation of Soviet Union, there was established the Prosecutor's Office of the USSR Supreme Court within the countries of the Unit. The SSRA Prosecutor's Office became Soviet Armenia's subdivision, acting under the Prosecution Office of the USSR Supreme Court.
The USSR Constitution, which was passed in 1924, assigned the Prosecution Office with the "responsibility of the establishment of revolution's legality" on the whale territory of the country. In 1927 whole investigative system was transferred from the Court system into Prosecution Bodies of the Republic.
On July 20' 1933, according to the joint decision of USSR Central Executive Committee and Populist Commissariat, the USSR Prosecutor's Office was created. The Prosecutor's Offices of the USSR Countries became its structural subdivisions. In the same year the Charter of the USSR Prosecutor's Office was approved. It prescribed the functions of USSR Prosecutor's Office, the relationship of the USSR Prosecutor General and Prosecutors of the Union Republics, and the methods and the principles of the functioning and coordination of the Prosecution Bodies, including SSRA Prosecution.
The Soviet Armenian Constitution, which was passed in 1937, noticeably raised the role and the meaning of prosecutorial control. It clarified and prescribed the structure of the Prosecutor's Office, presenting it as a unified and centralized system, which acted under the coordination of USSR Prosecutor. SSRA Constitution stated that "the high control over the duly implementation of Laws by the institutions under the Populist Commissariats, as well as by official persons or by citizens, on the territory of SSRA, is realized both, by USSR Prosecutor immediately, and through SSRA Prosecutor".
By the Decree of the USSR General Council, dated on February 27' 1959, there were created Collegiums, as within the USSR Prosecution Office, so within the Prosecution Offices of the USSR. In the result, within the SSRA Prosecutor's Office also was created the Collegium, which was headed by the Prosecutor of the Republic.
Proclaiming the independence on 21' 1991 the General Council of the second Republic of Armenia declared, that the application of the previous legal and other acts, in the territory of the country, would continue, unless they contradicted to the ideals of Declaration of Independence. One of the Laws, not contradicting to the mentioned principles, was the USSR Law "On Prosecution Office", and the Prosecutor's Bodies of the newly established independent Republic of Armenia, were, until passing the new Law, applying this Law in their activities.
One of the first steps in creating domestic legislation, which regulated the RA Prosecutor's Office activities, was the establishment of the Military Prosecution Office as a separate subdivision within the structure of the RA Prosecutor's Office, on November 5' 1992.
Then, on July 5' 1995 was passed the first Constitution of the Republic of Armenia, which by the article 103 prescribes the range of the RA Prosecutor's Office authorities and issues.
The domestic Law on Prosecutor's Office was passed on July 1' 1998 and came into force on January 12' 1999. In the beginning of the 1999, according to the RA Law "On Prosecutior's Office" new structural division took place, dividing the system into the General Prosecutor's Office, with its Departments and Divisions; into the Prosecution Offices of the RA Provinces; of the Yerevan City; of the Yerevan City Districts; as well as into the Prosecutor's Offices of the Military Units.
On February 23' 1999 the Scientific-Educational Center of the RA General Prosecutor's Office was opened. It became one of the authoritative institutions in providing qualifications and realization of scientific-methodic researches for prosecutors and investigators.
According to the RA Government Decision N 207-N, dated on March 7' 2003, 1st of July was proclaimed as the Day of Prosecutor's Office Employee.