The diploma thesis deals with the role of audit assistant during the statutory audit. The main aim of this diploma thesis is to describe the selected procedures, which are carried out by the beginning audit assistant during the individual phases of the audit from the beginning to the end of the audit season.This diploma thesis consists of four main chapters. The first chapter defines the concept of audit, describes its types and explains objectives of statutory audit. The second chapter deals with the legal regulation of the audit in the Czech Republic. The third chapter characterizes in details the phases of audit. This part is followed by a fourth chapter which describes how the audit assistant is involved in the specific phases of the au...