New religious movements in Kenya have attracted a great deal of attention from scholars and theologians. Earlier studies on these movements have tended to accentuate historical and socio-political dimensions. However, much has not been done on the phenomenology and theology of these movements; consequently, thesis study is a contribution to the lacuna and knowledge. In this social enquiry, qualitative methods were employed to examine the phenomenology and theology of the ACHS. The study investigated beliefs and practices of the African Church of the Holy Spirit (ACHS), a religious movement in Kenya. This involved a theological evaluation of the rituals and their significance in worship, marriage and funeral rites from a Pentecostal point of view. Issues pertaining to Godhead and eschatology are also studied. The research has made three recommendations.