Patriotism, in its general sense, is considered as one of the main characteristics of poems in constitutionalism period. While patriotism was of a long tradition in Iran, after its several-hundred-year recess, it was revived in constitutionalism period. Frequent intrusions by neighboring countries and profit-seeking interventions of Europeans which resulted in humiliation of Iranians, as well as the weakness of the authorities in managing national affairs and maintaining Iran's territorial integrity wounded the pride of all Iranian patriots. As a result, poets, as their social mission, aimed to incite passion and understanding of the people regarding patriotism, and at the same time, cut short the hands of courtiers and foreigners. However, their patriotism was generally emotional and lacked an intellectual and philosophical depth. So, their attitude toward their country was the a combination of various patriotic beliefs including nationalism, internationalism, chauvinism, and even in the sense of birthplace. Considering the mixture of poets’ patriotic attitudes and also their mental and linguistic background, this paper attempts to study the intensions and levels of patriotism in the poems of prominent and influents poets of constitutionalism period.