In this research, the goal is to study factors effective on trust of Kermani citizens in Channel 1. Theoretical framework has been determined using communication and sociology theories. Indices of trust and variables effective on that have been extracted from theories of news image making, stigmatizing, four theories of press, use and gratification, suitable role, persuasion, cognitive balance and theories of sociologists such as Putnam, Giddens, Offe, Ingelhart, Erikson, Durkheim and Merton. Indices and variables effective on trust have been tested with Likert Spectrum. Sincerity and clarity in news, impartiality against special groups and parties, adjustment of news content and subjects with the audience’s need, comprehensibility of news for the audience and meeting more news needs of audience are the trust indices. Statistical population of citizens with age of 18 above resided at 5 districts of Kerman City. Data were collected in 2012 from 400 people with survey method and questionnaire technique in stratified and simple sampling method. Research results show that Kermani citizens averagely trust in news of Islamic Republic of Iran channel 1. Based on the results, there is significant relationship between economic-social position, social security feeling, satisfaction with life, religiosity of people and trust of citizens in channel 1. Multivariate regression and path analysis show that independent variables explain 35.8% of total variation of trust in channel 1 news.