A toner conveying device includes a toner replenishing tube extended upwardly/downwardly, a loosening member reciprocating upwardly/downwardly inside the replenishing tube, a toner conveying tube, a conveying member and a converting part. The conveying tube is extended in a crossing direction with the replenishing tube and communicates the replenishing tube and a toner containing part. The conveying member is arranged rotatably inside the conveying tube to convey a toner from the toner containing part to the replenishing tube. The converting part converts rotating movement of the conveying member to reciprocating movement of the loosening member. The loosening member includes a straight line portion and a protruded portion. The straight line portion is engaged with the conveying member via the converting part and extended downwardly along the replenishing tube. The protruded portion is continued from a lower end of the straight line portion, and bent and protruded in the crossing direction.