A connection terminal comprising: a multilayer body having a first end portion (1a, 3a) and a second end portion opposite to the first end portion, the multilayer body having first to third dielectric layers stacked one on top of another; a first line conductor which is disposed on the first dielectric layer and extends from a central portion of the first dielectric layer to the first end portion and is exposed to be connectable and accessible at the first end portion; a first grounding line conductor which is disposed on the first dielectric layer adjacent to both sides of the first line conductor and is exposed to be connectable and accessible at the first end portion; two pieces of second line conductors, each of which is disposed on the second dielectric layer and extends from a central portion of the second dielectric layer to the second end portion and is exposed to be connectable and accessible at the second end portion; a second grounding line conductor which is disposed on the second dielectric layer adjacent to both sides of each of the second line conductors and is exposed to be connectable and accessible at the second end portion; a third line conductor which is disposed on the third dielectric layer so as to extend from a central portion of the third dielectric layer to the first end portion and is exposed to be connectable and accessible at the first end portion; a third grounding line conductor which is disposed on the third dielectric layer adjacent to both sides of the third line conductor and is exposed to be connectable and accessible at the first end portion; and connecting conductors that connect the first line conductor to one of the second line conductors and connect the third line conductor to the other of the second line conductors, respectively, in the central portions, wherein the third grounding line conductor is placed above the first line conductor. a multilayer body having a first end portion (1a, 3a) and a second end portion opposite to the first end portion, the multilayer body having first to third dielectric layers stacked one on top of another; a first line conductor which is disposed on the first dielectric layer and extends from a central portion of the first dielectric layer to the first end portion and is exposed to be connectable and accessible at the first end portion; a first grounding line conductor which is disposed on the first dielectric layer adjacent to both sides of the first line conductor and is exposed to be connectable and accessible at the first end portion; two pieces of second line conductors, each of which is disposed on the second dielectric layer and extends from a central portion of the second dielectric layer to the second end portion and is exposed to be connectable and accessible at the second end portion; a second grounding line conductor which is disposed on the second dielectric layer adjacent to both sides of each of the second line conductors and is exposed to be connectable and accessible at the second end portion; a third line conductor which is disposed on the third dielectric layer so as to extend from a central portion of the third dielectric layer to the first end portion and is exposed to be connectable and accessible at the first end portion; a third grounding line conductor which is disposed on the third dielectric layer adjacent to both sides of the third line conductor and is exposed to be connectable and accessible at the first end portion; and connecting conductors that connect the first line conductor to one of the second line conductors and connect the third line conductor to the other of the second line conductors, respectively, in the central portions, wherein the third grounding line conductor is placed above the first line conductor.