There are provided an information sharing system, a common terminal and a non-transitory computer-readable storage medium storing an information sharing program. An information sharing system includes: a common terminal; and one or more personal terminals each configured to transmit an object to the common terminal and perform a remote operation on an object displayed on a common screen. The common terminal includes a receiving section configured to receive an object transmitted from one of the personal terminals, a display section including the common screen and being configured to display the object on the common screen, and a control section configured to determine, upon receiving an instruction to perform a remote operation on an object displayed on the common screen, whether the instruction satisfies a predetermined condition or not, and prohibit performing the remote operation in response to a determination that the instruction does not satisfy the predetermined condition.