Trim and tilt apparatus for marine vessel propulsion machine and marine vessel propulsion machine

A marine vessel propulsion machine comprising:

• a marine vessel propulsion machine main body which gives a propelling force to a ship body;
• a bar-shaped rod having one end portion that is attached to the marine vessel propulsion machine main body;
• a first cylinder;
• a first piston which is mounted in the other end portion of the rod, is accommodated in the first cylinder, and divides a space in the first cylinder into a first space on the one end portion side and a second space on the other end portion side;
• a second cylinder which accommodates the first cylinder therein;
• a covering member which covers an opening portion of one end portion of the second cylinder;
• and
• a second piston which is mounted in one end portion of the first cylinder to divide a space in the second cylinder into a third space on one end portion side and a fourth space on the other end portion side, is formed with a communication hole that allows the first space and the third space to communicate with each other, comes into contact with the covering member, and divides the space into an inner space on a more inner side than the communication hole and an outer space on a more outer side than the inner space.