Trust in both, objective data and subjective data, is indispensable in order to realize the double helix model of chance discovery. This study aims at clarifying the significance and possibility of trust in the aspects of input and output by focusing on the Internet community using data of a questionnaire survey involving participants from Japan and the US. The main results are as follows: 1) the U.S. people have a strong tendency to gather information positively, to examine the trust in the objective data, to feel other trustworthiness as the basis of subjective data, and to output trustworthy information as well as other-trustworthiness into t he web community rather than the Japanese do, 2) the levels of self-help tendency and information-gathering tendency influence the conditions of trust in the Internet, 3) human interaction in the web community and perception of the Internet risks are affec ted by the trust of individuals.