A trim and tilt device includes: a cylindrical cylinder; a partition member provided in contact with the cylinder so as to be movable in an axial direction of the cylinder and partitioning a space inside the cylinder; a rod member to which the partition member is attached on one end side of the rod member and which moves relatively in the axial direction of the cylinder together with the partition member thereby adjusting a tilt angle of a marine vessel propelling machine body with respect to a hull; and a rod guide member electrically connected to a sacrificial anode and having a hole so that the rod member passes through the hole, and the rod guide member has a conductive portion disposed at a position, where the hole is formed, so as to electrically connect the rod member and the rod guide member.