An image forming apparatus which is capable of continuously offering a function of the image forming apparatus to a user, who is using the image forming apparatus by operating a mobile terminal, without interruption by other terminals. When a wireless communication is established using NFC (near-field communication), a request to execute a job from mobile terminals other than the mobile terminal is rejected from when the wireless communication is established to when a connection release request from the mobile terminal is received. When a request to execute a job is received using Wi-Fi without a wireless communication being established using NFC, a request to execute a job from mobile terminals other than the mobile terminal which has sent the request to execute the job is rejected from when the request to execute the job is received to when execution of the job is completed.