For reliability check of timber structure bolt connections subjected to double shear with thick plates as outer members and inner timber member is nowadays possible to use equations which were derived by Johansen and which are also used in Eurocode standards. These equations assume that the loads are the same on both sides. But it may often be a case when the loads are not the same. The paper deals with reliability in ultimate limit state of timber structure bolted connections subjected to unequal double shear with thick plates as outer members and inner timber member. There are derived equations for calculation of the reliability of this connection type in the ultimate limit state.