The main purpose of this study was to investigate effective factors on adopting technologies among trout fish
farmers in Guilan province by Unified Theory of Acceptance and Use of Technology (UTAUT). Statistical
population of this research contained of all managers of trout fish farms of Guilan province (N=170) that
base on limitation of structural equation modeling in determining sample size, 97 of them were chosen as a
sample. Study tool was contained Vankatesh and et al. information technology questionnaire in six items. To
obtain validity of questionnaire; content, face, convergent and discriminant validity were used. As well, to
obtain reliability of questionnaire; principal component analysis, Cronbachs alpha, Dillon-Goldstein’s ʃ and
reagent stability were used. To accomplish analysis of data, SPSSV19 and SmartPLSV2 software were used in
descriptive and inferential statistics. For testing hypothesis, structural equation model (SEM) and partial least
squares (PLS) that focus on reagent variance were used. The results showed that there was significant
relationship between performance expectancy and behavioral intention. Also there was significant
relationship between intention to use and use behavior of aquaculture technologies. Model explains 28.8
percent of behavioral intention variance and 7.9 percent of use behavior of aquaculture technologies variance
among trout fish farmers. To increase willingness to accept the technology among trout fish farms in Guilan
province, it is suggested that extension-education courses for raising knowledge and awareness of
aquaculture technology to be held by organizations. Providing financial resources and adequate knowledge
will enable trout fish farms to equip with the aquaculture technologies.