A user support device which accurately judges that a user is in a confused state and supports the user is provided. The user support device includes: a confused state judging unit which judges whether the user is in a confused state or not based on a tendency of variation in dwell time on which a decision making time until a next input action is executed is reflected in a sequence of input actions executed by the user who makes transitions between several menus arranged in a tree structure; and an operation support processing unit which provides operation support when the confused state judging unit makes a positive judgment that the user is in a confused state.