A closed connection of two different isotropic wedges has been considered within the scope of the antiplane problem. A finite-length crack emerges from the top of this connection at an arbitrary angle to the symmetry axis of the structure. The exact solution of the problem was obtained through the problem’s reducing to the Wiener – Hopf scalar equation. The dependence of the stress intensity factor (SIF) at the crack tip on the structural parameters was studied. The effects of an increase and a decrease in SIF were compared with those known for the case of a homogeneous medium. It was shown that the stress asymptotics near the junction vertex could have one or two singular terms determining both strong and weak singularities at this singular point.