Influence behaviors have generally been affected by personality. In organizational research, Machiavellianism has commonly been defined as the need to develop and defend one¡¦s power and success. Thus, Machiavellianism more likely that personality may predict use of these influence tactics. The purpose of this study is to examine the relationships of Machiavellianism and upward influence tactics, and examine the moderating effect of demographic variables. This study selected 2828 business employee to answer the questionnaire, and there are 2761 copies valid return. A factor analysis, there are five dimensions of upward influence tactics: upward device, rational persuasion, impression management, ingratiation and pressure. The result showed that (1) there are hypotheses supported for strongly positive relationship between Machiavellianism and upward influence tactics, (2) the moderating effect of demographic variables were partly supported in this study.