In the title compound, C(21)H(33)N(4)S(3) (3+)·3I(-), three secondary amines are protonated, while the central amine remains unprotonated. One thio-phene is disordered with an occupancy ratio of 0.868 (6)/0.132 (6). Each protonated amine is involved in N-H⋯I hydrogen-bonding inter-actions with the iodide anions.