Today, a workforce of tens of millions is working in Islamic Republic of Iran in different sectors of public, industry and trade to fulfill their duties and responsibilities. Obviously, it cannot be claimed that all these people innately hold the knowledge, skills and type of behaviors required to do their occupational responsibilities. Thus, they need training to improve the quality and quantity of their jobs. Today, human resource training is highly effective on productivity improvement. Therefore, this research intends to study the effects of different human resource training methods on the improvement of productivity in Bank Mellat, across Tehran province. It is a descriptive and correlational research and the data were collected through a researcher-made survey from 184 employees of Bank Mellat. Data were analyzed by confirmatory factor analysis and structural equation modeling using Lisrel software. Results show that all the dimensions of training affect the productivity of employees. Key Words: Training, Information Provision, Simulation, On Job Training, Productivity.