If convicted, he also would have to attend sentencing hearings and hearings at which victims explain the impact on their lives of the crimes and judges discuss reparations.
Kenyatta has pledged to cooperate with the court and has always attended hearings when called upon by judges, but privately members of his government have said they don't believe he will report to The Hague.
While a decision excusing Kenyatta from attending much of his trial is a victory for the president, he still wants to avoid standing trial at all.
His lawyers last week called for a permanent halt to the case, arguing that "the prosecution is presiding over an utterly corrupt and dishonest case" based on false witness testimony.
There was no immediate reaction from prosecutors to Friday's ruling, but they can appeal.
Kenya's deputy president, William Ruto, and a broadcaster Joshua Arap Sang, also are on trial in a separate case dealing with the postelection violence that left more than 1,000 people dead in late 2007 and early 2008. Judges made a similar ruling allowing Ruto to miss most of his trial, but prosecutors appealed the decision and he has to attend his trial pending a decision by the court's appeals chamber.
Ruto has complied and flown to The Hague whenever his trial is in session, but speaking to reporters this week he sounded like his patience was running out.
Ruto said Kenya has asked the U.N. Security Council to defer the International Criminal Court cases against him and Kenyatta for a year, but Ruto said he would rather his trial go ahead if he doesn't have to attend hearings in The Hague.