nÃo hà / This work aimed to investigate the existing links between the Internal Social Responsibiliy (ISR) and the Organizational Commitment. The practices on the Internal Social Responsibility considered herein were the social indications from ETHOS Institute of Companies and Social Responsibility, focusing the following points: dialogues and participation; human respect and decent work (ETHOS, 2006). This study has taken use of a documental and exploratory research(CERVO; BERVIAN, 1983). The research bibliography approached the social responsibility according to Ashley (2003), Mcintosh et al. (2001), Oliveira (2002), Srour (2003), and the organizational commitment with the authors Bastos et al. (1997), Bonavides, Oliveira e Medeiros (2006), Medeiros et al. (2005), Meyer e Herscovitch (2001). The documental research was a base for the research samples and for the identification of the developed actions held by the companies. The present research was done in two big companies in the areas of services: the sewage and water company in Cearà State(CAGECE) and Guanabara Transportation Company(GUANABARA), both winners of Delmiro Gouveia Award in social responsibility and in the social performance category. The data collection was done through a methodology of survey application divided in: elaboration of data collection, a series of ordered questions with three sets of RSI indices, and three bases of organizational commitment, where it was used Liket scale of variation from one to five to the answers. The questionnaire was answered by hand and was applied with two hundred and twenty operational level employees, divided in an equable way in the two companies. The presentation methods and the analysis of data expanded in three blocks: the first deals with the profile of the interviewees out of an arithmetic average and relative attendances; the second presents the main analysis of components through the factorial analysis which present the principal actions in RSI which produced commitment; and the third block deals with a comparative analysis involving the two companies. As instruments of process it was used the SPSS and the Excel programs. The results obtained in this research show that the internal social responsibility has a great influence in the organization commitment of the workers. The actions of the internal social responsibility which most influence in the expected commitment have a lot to do with the social index dialogue and participation, model quoted by Valladares, Leal Filho and Roman(2005); (GuimarÃes and Borges, Marques and Adorno(2005), and the model of commitment generated by these actions is the affectivity. / Este trabalho buscou investigar os vÃnculos existentes entre as prÃticas de responsabilidade social interna - RSI e o comprometimento organizacional. As prÃticas de responsabilidade social internas consideradas foram os indicadores sociais do Instituto Ethos de Empresas e Responsabilidade Social, enfocando os seguintes pontos: diÃlogo e participaÃÃo, respeito ao indivÃduo e trabalho decente (ETHOS, 2006). Este estudo caracteriza-se como uma pesquisa exploratÃria, descritiva e comparativa, apoiando-se em pesquisa bibliogrÃfica e documental (CERVO; BERVIAN, 1983). A pesquisa bibliogrÃfica abordou a responsabilidade social baseada nos autores Ashley (2003), Mcintosh et al. (2001), Oliveira (2002), Srour (2003) e o comprometimento organizacional com os autores Bastos et al. (1997), Bonavides, Oliveira e Medeiros (2006), Medeiros et al. (2005), Meyer e Herscovitch (2001). A pesquisa documental foi base para a definiÃÃo das amostras da pesquisa e para a identificaÃÃo das aÃÃes desenvolvidas pelas empresas. A pesquisa foi realizada em duas empresas de grande porte no ramo de serviÃos, a Companhia de Ãgua e Esgoto do Cearà - CAGECE e a Expresso Guanabara, ganhadoras do PrÃmio Delmiro Gouveia de Responsabilidade Social, na Categoria Desempenho Social 2006. A coleta de dados deu-se por meio da aplicaÃÃo de um survey, dividido em: elaboraÃÃo do instrumento de coleta de dados, sÃrie ordenada de perguntas, com trÃs blocos dos indicadores de RSI e as trÃs Ãncoras de comprometimento organizacional, adotando-se uma escala Liket de variaÃÃo de 1 a 5 para as respostas. O questionÃrio foi respondido por escrito e aplicado a 220 funcionÃrios de nÃvel operacional, divididos de forma igualitÃria nas duas empresas. Os mÃtodos de apresentaÃÃo e a anÃlise dos dados desenvolveram-se em trÃs blocos, o primeiro trata do perfil dos entrevistados a partir de uma mÃdia aritmÃtica e freqÃÃncias relativas, o segundo apresenta a anÃlise dos componentes principais, atravÃs da anÃlise fatorial, que apresenta as principais aÃÃes de RSI que geraram comprometimento, e o terceiro faz uma anÃlise comparativa entre as duas empresas; como instrumentos de processamento, foram utilizados os programas SPSS 10.0 e Excel. Os resultados obtidos indicam que a responsabilidade social interna tem grande influÃncia no comprometimento organizacional do trabalhador. As aÃÃes de responsabilidade social interna que exercem maior influÃncia no comprometimento partem do indicador social diÃlogo e participaÃÃo, modelo citado por Valladares, Leal Filho e Roman (2005); (GuimarÃes e Borges, Marques e Adorno (2005) e o modelo de comprometimento gerado por estas aÃÃes à o afetivo.