is masturbation a mortal sin or a venial sin? Objectively - a mortal sin. Subjectively - only your confessor can tell you whether its mortal or venial in your individual case. Once your confessor has spoken, its irrelevant what other people think is the case. Remember, that for a sin to be mortal, three conditions must together be met. It has to be a very serious and grave matter, which is committed with full knowledge and with deliberate consent. What we are saying is that for it to be mortal sin, it would have to be done deliberately. i told him no i had not and he went on to explain that during vatican i masturbation was considered a very grave, serious, and mortal sin. He said after that and during vatican ii, it was concluded that masturbation is only a venial sin now. This didnt sound accurate, but then again im still learning a lot about the faith all the time. Is masturbation a mortal sin or a venial sin? The roman catholic church divides sin into two categories venial and mortal. However, a single mortal sin can determine ones eternal destiny after death. Those who took the time to read our article against justification by faith alone (section), should have noticed a point which concerns this issue. Paul gives a list of some of the main mortal sins which exclude people from heaven. I masturbate and i read that it is a sin and i saw mixed views on it when it comes to it being mortal or venial. When i masturbate im not lusting over anyone nor does it get in the way of any other relationships because i am only 14 i am worried that it is mortal because what if i die in a car crash, murder, or sickness before i can even confess these sins to a priest. Whether masturbation is a mortal or venial sin depends upon the criteria for a sin to be mortal which were given in the answer to the question on mortal and venial sin. Now that you know that it is a grave sin and why, it is a mortal sin. Catechism of the catholic church, paragraph 2352 hardon, john a. For most, masturbation is a venial sin yet even venial sins demand repentance. The terms, mortal and venial sin, come from the new testament. In the first letter of john (i john), chapter 5, verses 16 through 17, saint john writes if anyone sees his brother sinning, and if the sin is not deadly mortal, he should pray to god and he.