Automated negotiation is a process of autonomously overcoming conflicts between intelligent agents and achieving agreement. The literature has proposed several approaches to automated negotiation. To this end, the aim of this study is to summarize the state-of-the-art on automated negotiation for the research community to identify the research gap and to conduct further research in the automated negotiation domain. To achieve this goal, we conducted a systematic mapping study (SMS) on the automated negotiation literature on a set of 73,760 candidate studies. Through a precise search and selection procedure, we identified a set of 21 primary studies, published between the year 2017 and June 2022. As preliminary results of this mapping study, we provide the classification framework to identify and evaluate the automated negotiation literature, and an up-to-date map of the state-of-the-art on automated negotiation focusing on (i) the specific purpose of negotiation, (ii) the application domain in which it is employed, and (iii) how it is carried out in terms of inputs, outputs, and used techniques.