  Nowadays peoples are actively involved in giving comments and reviews on
social networking websites and other websites like shopping websites, news
websites etc. large number of people everyday share their opinion on the web,
results is a large number of user data is collected .users also find it trivial
task to read all the reviews and then reached into the decision. It would be
better if these reviews are classified into some category so that the user
finds it easier to read. Opinion Mining or Sentiment Analysis is a natural
language processing task that mines information from various text forms such as
reviews, news, and blogs and classify them on the basis of their polarity as
positive, negative or neutral. But, from the last few years, user content in
Hindi language is also increasing at a rapid rate on the Web. So it is very
important to perform opinion mining in Hindi language as well. In this paper a
Hindi language opinion mining system is proposed. The system classifies the
reviews as positive, negative and neutral for Hindi language. Negation is also
handled in the proposed system. Experimental results using reviews of movies
show the effectiveness of the system
