The present disclosure relates to an apparatus and a method for managing a Mission Critical Push-to-Talk (MCPTT). The apparatus comprises: a first MCPTT client configured to send an MCPTT request message to a second MCPTT client through a MCPTT server, and receive, from the second MCPTT client through the MCPTT server, a MCPTT response message in response to the MCPTT request message, wherein an MCPTT call in the MCPTT service is established between the first MCPTT client and the second MCPTT client by the MCPTT server.