Disciplinary punishment for legality controls and position Omani and Egyptian law from it The principle of the legitimacy of disciplinary punishment is one of the most important axes on which to achieve justice in the disciplinary area of the public 108 العدد الرابع والثالثون ــ يوليو 2020م employee Which leads to a fair punishment for the wrong employee and prevents disciplinary authority from being arbitrary, except that the principle of the legiti macy of disciplinary punishment differs from the principle of the legality of the punishment in the criminal field which means "no crime and no punishment except by text" , Where disciplinary legitimacy is limited to "No penalty except by text" and the application of this principle requires disciplinary punishment to be imposed within the penalties mentioned exclusively , Where the disciplinary authority must choose a sanction commensurate with the disciplinary violation, and the application of the principle of the disciplinary sanction of the law prevents the disciplinary authority from turning into an arbitrary, authoritarian authority where it adheres to a set of procedures to be followed regarding employee discipline and hence the importance of this research which highlights the controls of applying the principle of The legality of disciplinary punishment in both Omani and Egyptian law .